Question about 1998 Mercedes-Benz SL 500
First, make sure the battery is good. If it normally goes dead in 1 night disconnect the battery for 1 night and if the car starts the battery isn't taking itself down. The next thing to look for are things that can be on with the ignition switch off such as glove box light, trunk or hood light, brake light cigarette lighters if it has them, interior lights. For the bulbs you can't see like the trunk light open the trunk then quickly but carefully touch the bulb if it's staying on it will be hot to the touch. Be careful if some bulbs have been on a long time they can burn you. I hope this helps. Take care.
Posted on May 16, 2019
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Posted on Jan 02, 2017
SOURCE: Won't start
Dear The FixYa Team,
To answer your question, No I do not have spark or fuel pressuer.
My husband has checked all the fuses, ignition switch, crank shaft
sensor & computer. All these check out. Any suggestions on what
we can do next. We appreciate your help with our problem.
Thank You, mindiescott
Posted on Sep 12, 2008
SOURCE: Instrument panel went dead
Checked Every fuse in the fuse box (no small task).This includes #4 - Power point Instrument Panel, #14 - Day time running lamps (auto lamps doesn't work nor does auto lock), #27 - ignition switch run feed, #35 - Instrument Cluster, #41 - Instrument Cluster, #42 - Delayed Accessory, #45 - Ignition switch run/start feed, #102 - Door locks body security module, #103 - Ignition switch, #110 - Ignition switch, & #116 - Ignition switch. But I also check all other ones as well, they all register OK. AC panel & radio work. Turn signals work. Mileage does not work, trip computer does. So, basically, everything works except auto head-lights, auto locks, and the dash cluster (no MPH, RPM, mileage display, Fuel, Temp, Tran Temp, and Oil Pressure).
Posted on Sep 30, 2009
Its pretty hard to test the fuel pump relay. Easiest way to test fuel function is at the motor from the fuel rail. There should be a high pressure fitting (similar to a tire valve stem) that you can push in to check for fuel. It should squirt out (fuel) if the pump is sending fuel to the motor and if not start back tracking looking for fuel pump/pressures/leak issues. If you decide to replace the relay then I would suspect $30-$50 or find a decent on at a junkyard. The relay should click when ignition is turnerd so u know its working properly.
Posted on Jan 22, 2011
SOURCE: 2002 kia Rio Altenator
Hi, the actual output voltage produced by the alternator will vary depending on temperature and load, but will typically be about 1-1/2 to 2 volts higher than battery voltage. At idle, most charging systems will produce 13.8 to 15.3 volts with no lights or accessories on. This can be measured by connecting the positive (+) and negative (-) test leads of a voltmeter to the battery posts while the engine is running.
Possible cause of the alternator not charging includes Slipping or broken alternator belt, Open diode, Open circuit in stator windings, Open charging circuit, Open field circuit, Worn brushes or slip ring and Defective voltage regulator..
Posted on Feb 27, 2011
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