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#1
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W124 500E won't even crank
Our 1993 W124 500E won't even crank-over.
When I turn the ignition switch, everything has power, lights works, gauges work, fuel-pumps start whirring, but nothing at the starter. No sound of a solenoid clicking. Battery fully-charged, lights don't even dim when attempting to crank. I measure 13.3 VDC at the B+ distribution block. I moved the tranny lever to Neutral and up & down to see if its is the neutral safety switch, but I'm not sure how to "jumper"/bypass this switch. What's the test procedure and points/areas to check for voltage to the starter ? I found a 3-pole connector near the CAN/LH electronics, which supposedly goes between the ignition switch and starter solenoid, but I don't know how or what leads to test for voltage. The factory CD-ROM is poor here. BTW: 3-months ago, I replaced the ignition tumbler, switch, and locking assembly with NEW MB OE parts. TIA, :-( neil |
#2
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The 1993 -95 cars have a starter lock-out relay(anti-theft).
The alarm module sends ground signal to that relay(K38). The relay gets power from fuse "B".
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Yes, I tested that starter-lockout relay behind the instrument cluster, and it's working.
Since I can't get a test lead onto the starter, I believe there is a connector that I can "tap" into and test, that is between the solenoid/starter and the harness. Is this the connector with 3-poles and is under the ABS wheel-sensor connector that is located on the back of the LH/ABS/ASR electronics box (passenger side in USA) ? If so, I see three wires, Violet/White, and Brown/Black, and Brown/can't remember. How/which ones do I test and what am I looking for ? TIA, :-) neil |
#4
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94 e320 won't start...weird problem
From the thread above. On the 500e the starter motor test will be a bit more difficult since the battery is in the trunk. There is a 3 prong connector near the brake booster/reservoir... Quote:
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Daily Driver: 02 E430 4MATIC In the family: '03 E500 // '04 ML500 // 64 220SE |
#5
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I have verified that the 3-prong connector on the 500E is NOT located near the brake booster, but mounted on the back of the LH/CAN electronics box, and under the ABS wheel sensor.
Otherwise, that link provides me the diagnostics needed. Thanks, :-) neil |
#6
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That cut/paste diagnostics test was written by me and it was a posting for a 124.032 , E320 chassis specific.
Be very careful when jumping 12V battery power on any electronics as you can very easily cost yourself some shorted expensive parts. When I post a test procedure for a specific model, I would prefer people don't cut/paste that info for diagnostics on a different model, as the assumption they are the same is a cause for concern. As you have the CD , go to starter circuit schematic and you will see the starter lock-out series chain.. If you do not find it , I will look it up for your specific chassis. |
#7
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AD,
I publish the photos and description at this link. http://web.mac.com/fulltimefamily/iWeb/Site/Photos.html |
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