The fault code says engine suction fan or air con shorted to positive.Terminal 15 relay has 2 positive feeds.when this relay is taken out the fan stops but car would not start.Please advise Tnx
The fan control module is defective.....would scan codes in engine control module to insure this diagnosis is accurate. I've replaced quite a few on Mercedes Benz models. The reason for the scan of the engine control module is to insure the DME (engine control module is not commanding "ON" the engine cooling fan. The factory scan tool can view these commands. If the DME is not commanding the suction fan to operate...the fan module is indeed defective.
Scott, Porsche Master Tech 35 years.
Testimonial: "Hi Scott tnx for your advise.I fitted a a new suction fan,diagnostic test says engine suction fan or air con shorted to positive.The black and white wire to engine fan has a positive feed as soon as ignition is turn on.Checked wiring from fan plug to fuse box and found that the black and white wire gets a positive feed from terminal 15 relay,when this relay is taken out car would not start and suction fan does not spin.Terminal 15 relay (P) in fuse box has has 2 positive feeds as soon as ignition is turned on,is that normal? Many Tnx Farouk"
SOURCE: 2002 PT Cruiser LE (no Turbo) Overheating. (Fan
There is no machine for this,however a VERY skilled auto electric shop might be able to help.They really have to have a Gift with car wiring to fix your problem,it can be FIXED,find the right shop in your area.I will try and think this through to help you,this is what I used to do,It's not a book problem it is experience that will fix your car. I do have a question? How does your car run without the AC on?
SOURCE: Renault Clio Sport 182 Air Con and fan blower fault
I also have a 53 clio with climate control and the fan stopped working. After being quoted £104 by dealership I decided to have a go myself. Bonnet up, remove driverside scuttle cover. Unplug fan resistor 7701051272 (large plug with black wire to fan)remove securing screws and resistor. Dismantled casing and peeled away gel from soldered side of circuit board around mosfet transistor-desolder and remove. Mine was a N342AD 75344G but the nearest I could get was HUF75337P3 from Maplin £1.68. This was the wrong 'package size' but I managed.Close the clamp slightly (before)to hold transistor firmly and then insert transistor and solder. Reassemble. After I got an email from a scrappy QUOTING £20 if you don't fancy the messing about.
Ian
SOURCE: Will not charge
you will get some funny answers from some of these "experts " The symptoms suggest to me with out much doubt that the regulator is not doing its job correctly ,consistently.Iwould take it to an AUTO ELECTRICIAN and get it tested in situ.... there is only 4 things it can be , wireing ---battery---alternator-----regulator and of those the reg. is the only one that chops and changes. it will cost little for a sparky to check the reg ,. AND I WOULD LIKE TO KNOW THE OUTCOME
SOURCE: how to wire a harry moss air horne relay to
If the compressor has 3 air connections on top then the two lower terminals with nuts are the + and - supply inputs to the compressor motor. The two top spade terminals power a solenoid valve which changes a triple sequence (illegal?) to a combined blended triple tone. I don't think polarity is an issue but to check this connect a 12V battery -ve to the mounting bracket on the compressor. Attach 2 wires to a headlamp bulb and connect one to battery +ve. Then touch the spare wire to each of the 4 terminals in turn. If the bulb lights that terminal is at compressor ground. You can determine the operation of the relay in the same way. Between 2 terminals the relay will operate. Note those and then test each to the relay bracket to see if one side of the coil is grounded. By powering the relay directly from the battery you can then use the bulb to determine which contacts are 'made' when the relay operates. You will need a relay to control power to the motor. The solenoid valve probably only takes a couple of amps. You could run both the motor and the solenoid valve from the same relay if you just wanted a blended composite tone.
SOURCE: 1994 Camaro Z28 Radiator Fans wont come on once
http://shbox.com/1/4th_gen_tech2.html#cooling
this should help
Dash203 views
Usually answered in minutes!
×