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Car Forum / Mercedes-Benz Cars / November 2007420 1988 probs
Also I have noticed that the electric front windows are inoperative, no heat on front and back windows, but motor warms up o.k. There are 2 black plastic relays on the outside firewall (about the size of the old matchboxes) that have small burn marks on their tops. Does this mean that they are blown and what do they control? Also a clear plastic relay that "looks" good. Any suggestions well appreciated..... Window switch activates a relay which powers the window motor a/k/a "regulator". Suspect the relays you found may be for the windows, others here may confirm that. The question is why are those relays burned? Perhaps the switches are dirty and stuck ON, or the regulators are shorted - who knows without further investigation?  Signature© 2007 T.G.Lambach. Publication in any form requires prior written permission. Thanks T.G., Nope, I removed them and replaced after using electronic spray cleaner. Still no luck.... No idea why they are burned. Any suggestions anyone please??? > Window switch activates a relay which powers the window motor a/k/a > "regulator". [quoted text clipped - 3 lines] > Perhaps the switches are dirty and stuck ON, or the regulators are > shorted - who knows without further investigation? Hi Group -- There is another stupid problem now. I went to start the car today only to find no turnover at the starting motor. So I retrieved my multimeter to test the voltage. I was disappointed to see the battery tested o.k. at 12.34 volts ( engine off of course) I heard an slight continual "electric Noise" on the 3 plastic relays that I mentioned earlier during continual ignition "on" - hoping this could be related to the other problems - rear defrost (blower type), headlight wipers not working and windows not working. Hopefully this can be sorted out, winter is here already. Any suggestions appreciated. Regards. Tony > Thanks T.G., > Nope, I removed them and replaced after using [quoted text clipped - 7 lines] >> Perhaps the switches are dirty and stuck ON, or the regulators are >> shorted - who knows without further investigation? > Hi Group -- > There is another stupid problem now. I went to start the car [quoted text clipped - 23 lines] >>> Perhaps the switches are dirty and stuck ON, or the regulators are >>> shorted - who knows without further investigation? The Neutral Safety switch is often to blame for such no cranking problems. Wiggle the shifter, try it, move the shifter from P to L and back to P try it, and try it in N. Switch is in the left side of the transmission (looking from the car's front). If nothing found there suggest the starter as the next suspect. Signature© 2007 T.G.Lambach. Publication in any form requires prior written permission. Thank you, she does start in N T.P. > The Neutral Safety switch is often to blame for such no cranking problems. > Wiggle the shifter, try it, move the shifter from P to L and back to P try > it, and try it in N. > Switch is in the left side of the transmission (looking from the car's > front). > If nothing found there suggest the starter as the next suspect.
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