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Old 09-13-2006, 03:28 PM
david s poole david s poole is offline
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
td signal

this is a voltage put out by the ignition unit that keeps the f/p relay in after start.it is also connected to the tach,the climate control relay, the main computer [i may have missed one]it starts out at approx 10vdc at idle and goes down slowly as rpm's rise.it's possible that the ignition unit has quit sending this signal but still sparks,but more likely that broken wire or one of the other consumers dragging to ground.should be able to identify at inner left fender near ignition box as a green wire with yellow stripe.
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David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
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