Cadillac Cars & Trucks - Page 5 - Answered Questions & Fixed Issues

54,engine bay fuse blows only a service manual shows what all fuses connect to , in total. only so I read that now to you. hummm all fuses in the SM have names not numbers. the lid to fuse box usually has name. of the fuse. ok only the users guide shows fuse # and 54 is clearly named there as, POWER MODING. AND IN FACT IS ONLY A TINY 2AMP FUSE. THIS FUSE GOES 2 PLACES 1: IGNITION SWITCH PIN2 2: TDM THEFT DETERRENT MODULE. PIN 1. YES GOES TO BCM PIN X1-14 , KEY ON, ONLY. YOU WILL HAVE TO PULL MODULES, TO SEE IF MODING FUSE HOLDS AND NOT BLOW. I'D PULL TDM FIRST

I would look for a vacuum leak.

Here's a wiring guide for the fuel pump on a 2000 Cadillac Deville: 1. Remove the fuel tank and access the fuel pump module. 2. Disconnect the electrical connector from the top of the fuel pump module. 3. Locate the wiring harness that runs from the fuel pump module to the car's electrical system. 4. Cut the wires on the old fuel pump module connector, leaving enough wire to splice the new connector onto. 5. Connect the black wire from the new fuel pump module connector to the black wire in the car's wiring harness. 6. Connect the purple wire from the new fuel pump module connector to the purple wire in the car's wiring harness. 7. Connect the gray wire from the new fuel pump module connector to the gray wire in the car's wiring harness. 8. Connect the black/white wire from the new fuel pump module connector to the black/white wire in the car's wiring harness. 9. Connect the new fuel pump module electrical connector to the car's wiring harness connector. 10. Reinstall the fuel tank. Note that it is important to follow the wiring guide carefully to ensure proper installation and avoid damaging the fuel pump or electrical system. If you are unsure about any step of the process, it is recommended to seek assistance from a professional mechanic or refer to the vehicle's service manual.

There are two easy tests for the catalytic converters. One, use a infrared pyrometer and measure the temperature of both catalytic converters and compair the readings. There should not be much difference between the two if both are flowing correctly. Another easy test is to drill a 1/4" hole before each cat and check for excessive back pressure.

The 2007 Cadillac DTS does not have an inertia fuel reset switch. Instead, it has a fuel pump relay located in the rear fuse block under the back seat. If you are experiencing a fuel system issue, you may want to check the fuel pump relay and fuse first. If these components are functioning properly, you may need to have the fuel system diagnosed by a qualified mechanic.

ck here https://www.fixya.com/cars/t18863328-knock_sensor_location_cadillac_srx

not true at all the prime pulse is 1 to 3 seconds and stays off until cranked, only cranking matters prime only speeds up the start, cranking pressure matters. and rail pressure for sure. cranking. matters. most. if car has IMMo you know when the key fails the engine can run for 1 to 10 seconds on some cars, to get you say out of trouble or get the car off a curb to tow it? yes. of away from a cliff?????? hummmmm first is learn to find the IMMO lamp on the dash and see if it is glowing the correct way as they free users guide states fact #2: scan the pcm when it fails to start or stalls the scan tool tells you why, sure can, even shows key bad try both keys yet, came new with 2 keys new. car. both IMMO keys modern cars need scan too to diagnose EFI if can tell you lots of things like key bad,spark bad. or fuses blow or well 100s of things. scan it and use fuel pressure gauge at the rail. only if all fuses all good and scans show no clues.! then check pressure with a real meter.

the Northstar engines/4T80E transmissions there is a hidden drain plug for the transmission side cover that requires that the bottom pan be removed to drain the side cover oil storage area. The idea of flushing a 4T80E is even more ludicrous than a 4T60 transmission for this reason. READ RANGERS POST ALL AND NO DRY SUMP HERE https://caddyinfo.ipbhost.com/topic/10636-transmission-fluid/

i will now read the online service manual to you. https://eautorepair.net/Marketing/Default.asp blower fan located where. dash heater blower fails or radiator fans of some odd kind added later. coolant fan or dash? there are 2 coolant fans and 3 relays to run them and all 3 relays, can fail and coolant fans blow for ever and ever. fuse 6 kills the relay coils. only, so if relay is welded fans blow endlessly. even if bcm is removed from the car. on the other and the heater blower is 100% controlled by the BCM so car engine starts and runs and drives ok right. when did car last run perfectly> , or seen ever ? service manuals for 88 cars are not easy to find means real oem manuals, best. 35 years old ! no digital then ,just a huge paper bound book, remember? holy moly this 88' has a body controller here, bcm , relic amazing thing. facts: 1988 here is proof

ZakR Apr 13, 2023 ,HYJACKS 2014 POST WHY? I am having the same problem (YOU DON'T KNOW THAT) with a 97 Buick skylark 2.4. YOU USE THE WORD CRANKED FOR RUNNING WHY?when did car last run great last decade or?It will stay cranked if starting fluid is sprayed into the throttle body. NO PHOTO OF MISSING LINE, HOSE, OR METAL LINE OR OR WHAT?We just saw that one of the lines to the throttle body had broken off but when I plugged it back up it still won't stay cranked. PLEASE HELPSAY IT CRANKS FAST BUT WILL NOT START AND STAY RUNNINGbe clear on that or get 50 wrong answers.hint: we can not hear it crank. dead/fast or slow.does it start if you add 5% right foot throttle>? (this adds AIR)FUSES ALL GOOD ARE THEY AND IMMO NOT FAILING RIGHT?the problem is low fuel pressure or: bad FUEL. is old.1: bad FPR (they love to fail that old) and stick wide open and not fuel pressure is way way too low.2: fuel pump relay bad.3: fuel pump fuse blow, check all fuses first a 20cent fix. yes.4: 12vdc does not make it to the PUMP cranking a 2 man test.5: ok #4 test passes pump is bad6: or injectors clogged, 7or PCM does not want run injectors due to other pcm inputs wrong.scan the PCM cranking to see why injectors are dead.if in fact they are , I use a scope or noid lamp to make sure all injectors fire. first. if not , scan the PCM is a MUST DOUSA answers me and no others./.USA or canada cars.this is all ASE basics. ask for help if confusedit takes tools to fix cars GOT TOOLS?

Hi Joan Whittaker,what does no crank mean. the starter motor is dead? some posters call d crank= running engine. which engine there? cranks fast but will not start. underhood fuse box f24 blown? step 2 after all fuses checked is: shift to Neutral see if that allows cranking per my red circle below is PCM control. is the dash IMMO lamp happy? as you can see the pcm decides to do the cranking or not via its starter relay. if you scanned the PCM it will tell you why it id not start. immo error OR A/t PRNDL (TRS) ERRORS. OOPS the IMMO page in your users guide covers IMMO if key 1 fails try key2, car came with 2 keys new. READ ALL PAGES ON IMMO FIRST If the engine does not start and the Security System Light comes on Security System Light (CLUSTER LAMP ICON LOOKS LIKE CAR CUT IN HALF WITH A PADLOCK, never ignore this lamp. This light flashes when the Theft Deterrent System has been activated. https://www.manualslib.com/manual/1078925/Cadillac-Cts.html?page=256

If your 2005 Cadillac STS is displaying "TheftLock" on the navigation and radio screen after replacing the battery, it means that the anti-theft system has been activated. Here are the steps you can take to unlock the system: 1. Turn the ignition key to the "On" position. Don't start the car, just turn the key to "On" position. 2. Wait for the "TheftLock" message to disappear from the navigation and radio screen. This may take up to 10 minutes. 3. Press and hold the "1" and "4" buttons on the radio simultaneously for several seconds until "000" appears on the screen. 4. Use the "TUNE" knob to enter the code that was provided with the vehicle's owner's manual. If you don't have the code, you will need to contact a Cadillac dealership or a certified mechanic to retrieve it for you. 5. Once you entered the correct code, press the "AM/FM" button to unlock the radio and navigation system. If all doesn't work, it's time to contact a Cadillac dealership or a certified mechanic to help you sort it out.

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PARK IS DEAD,BUT LEVER SHOWS PARK BAD SHIFTER OR BAD LINKAGE TO IT. BAD CABLES. THIS IS PURE PHYSICAL MECH. FAILURE NO MAGIC COMPUTERS, L

You need an auto electrician to use a scan tool computer to diagnose the electronics. They will come to you. https://www.google.com/search?q=auto+electrician+near+me ..

Is there anything else to check before changing the motors ? Yeah , hook up a factory or some other type of professional scanner an check for DTC'S - diagnostic trouble codes,also to see if the scanner will communicate with the modules. Changing batterys without a alternate power supply can cause modules to go to sleep permanently. Battery Disconnect Problems (aa1car.com) Power Sunroof System Components The Power Sunroof and Sunshade System consists of the following components: • Sunroof control module • Sunshade control module • Sunroof switch • Sunshade switch • Rail and track assembly upon which the sunroof and sunshade glass rides • S/ROOF/SUNSHADE Fuse 30 A • Body control module (BCM) Don't be a parts changer, learn how to diagnose! So before you go wasting your money on parts not needed see if a professional scanner can communicate with all the modules on the vehicle. The Power Sunroof System will operate only with the ignition turned to the RUN or Accessory positions, this allows for retained accessory power (RAP) control of the sunroof and sunshade through the body control module (BCM). With the ignition in the run or accessory positions, the BCM supplies the sunroof and sunshade control modules with ignition voltage which allows sunroof and sunshade operation. Once the ignition switch is turned to OFF the sunroof will continue to operate until any door is opened or when the RAP timer reaches its shut-off limit. For a description and operation of the RAP operation, refer to Retained Accessory Power (RAP) Description and Operation. Circuit/System Description The sunroof and sunroof shade modules supply each of the switch signal circuits with a 12-volt reference. When a switch is pressed the signal circuit is pulled low signaling the sunroof or sunroof shade open or close request. The modules determine the motor direction based on inputs received from the sunroof switches. When the modules reverse the polarity of the applied voltage, the motors reverse direction. The sunroof shade module contains the logic for opening and closing the sunshade based on Serial Data from the sunroof control module. Ignition voltage is supplied to the sunroof and sunroof shade modules by the BCM. B+ is applied to the sunroof and sunroof shade modules via the S/ROOF fuse. The sunroof shade module contains the logic for opening and closing the sunshade based on Serial Data from the sunroof control module. The sunroof shade module internally applies voltage and ground to the appropriate circuits of the reversible sunshade motor in order to move the sunshade panel to the open or closed positions.

DTC P2138: Accelerator Pedal Position (APP) Sensor 1-2 Correlation P2138 • The ECM detects that the voltage difference between APP sensor 1 and 2 is greater than 0.23 volt, 0.25 volt for LLT, with the pedal released. • The ECM detects that the voltage difference between APP sensor 1 and 2 is greater than 0.29 volt, 0.31 volt for LLT, with a partially pressed pedal. • The ECM detects that the voltage difference between APP sensor 1 and 2 is greater than 1.66 volts, 1.70 volts for LLT, with a fully pressed pedal. • Any of the above conditions exist, then a 5 second delay for MIL ON. Diagnostic Aids Test the current output of the 5-volt reference circuits if you suspect high resistance in the circuit. The current output should be greater than 80 mA for APP 1 and greater than 50 mA for APP 2. If you don't know how to test the 5 volt reference circuits you need to take it to a qualified repair shop. Circuit/System Verification Ignition ON, observe the DTC information with a scan tool. DTC P0651, P0652, P0653, P0697, P0698, or P0699 should not be set. ? If a DTC is set, refer to DTC P0641-P0643, P0651-P0653, or P0697-P0699. Observe the scan tool APP Sensor voltage parameters. Verify both of the APP sensor voltages are between 0.74-4.82 V. Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the procedure several times. DTCs P2122, P2123, P2127, P2128, or P2138 should not set. Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times. DTCs P2122, P2123, P2127, P2128, or P2138 should not set. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. Circuit/System Testing Ignition OFF, remove the fuse that supplies B+ to terminal 56-X2 of the ECM. Disconnect the harness connector at the accelerator pedal assembly. Test for less than 5 ? between the appropriate low reference circuit of the APP sensor and ground. ? If greater than the specified range, test the low reference circuit of the APP sensor for a short to voltage, or an open/high resistance. If the circuit/connections test normal, replace the ECM. Install the fuse that supplies B+ to terminal 56-X2 of the ECM. Note: The 5-volt reference circuit voltage can be within the specified range with a high resistance in the circuit. If this condition is suspected, refer to Diagnostic Aids. Ignition ON, test for 4.8-5.2 V between the appropriate 5-volt reference circuit of the APP sensor and ground. ? If less than the specified range, test the 5-volt reference circuit for a short to ground or open/high resistance. If the circuit/connections test normal, replace the ECM. ? If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit/connections test normal, replace the ECM. Observe the appropriate scan tool APP sensor voltage parameter. Verify the voltage is less than 0.3 volt. ? If greater than the specified range, test the signal circuit of the applicable APP sensor for a short to voltage. If the circuit/connections test normal, replace the ECM. Connect a 3 A fused jumper wire between the appropriate signal circuit and the 5-volt reference circuit of the APP sensor. Verify the APP sensor voltage parameter is greater than 4.8 V. ? If less than the specified range, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit/connections test normal, replace the ECM. ? If both APP sensor voltage parameters display greater than 4.8 V test the signal circuits of the APP sensors for a shorted together condition. If the circuit/connections test normal, replace the ECM. If all circuits/connections test normal, test or replace the accelerator pedal assembly.

Leon- I have a question to you about an old post you replied to about a RCA CC311 Camcorder. I inherited one, seems ok. But i not sure how to operate it. Not sure I wanted to buy a manual for $17 for it tho. Can you advise if/why I can't see anything through the viewfinder? Cam turns on, I don't have a tape in it tho. Thanks!

a wire is cut check near all body work you may find it.