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Old 08-03-2014, 05:16 PM
Wodnek's Avatar
Vintage Mercedes Junkie
 
Join Date: Jun 2004
Location: Southeast Wisconsin
Posts: 1,658
95 E 300 D electrical issue

95 E300D

I replaced the regulator for the blower, and all was fine.... for a day.
Now, after a few minutes the blower kicks down to low, and the SRS light comes on, and sometimes the ABS light too.

I figured it was the overvolt protection relay, and I put the one in from my parts car, same thing.

Any one have any ideas? does not seem to be keyswitch related. I tried the search, but didn't find anything helpful.
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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
1995 E300D Handed down to daughter
2006 CDI Wifes

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  #2  
Old 08-03-2014, 06:57 PM
ichris93's Avatar
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Location: Tampa Florida
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Quote:
Originally Posted by Wodnek View Post
95 E300D

I replaced the regulator for the blower, and all was fine.... for a day.
Now, after a few minutes the blower kicks down to low, and the SRS light comes on, and sometimes the ABS light too.

I figured it was the overvolt protection relay, and I put the one in from my parts car, same thing.

Any one have any ideas? does not seem to be keyswitch related. I tried the search, but didn't find anything helpful.
Can you feel the wires for the blower motor? Do they get hot?

I have been in cars and when the battery does not have enough amp to power everything the SRS and ABS kick off. Does the radio run? The headlights on or off?
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  #3  
Old 08-03-2014, 07:16 PM
Wodnek's Avatar
Vintage Mercedes Junkie
 
Join Date: Jun 2004
Location: Southeast Wisconsin
Posts: 1,658
Quote:
Originally Posted by ichris93 View Post
Can you feel the wires for the blower motor? Do they get hot?

I have been in cars and when the battery does not have enough amp to power everything the SRS and ABS kick off. Does the radio run? The headlights on or off?
Headlights off. Battery is about a year old, a mercedes battery from the dealer. The radio did run, but I took the battery out to get at the OVP, and now it is code locked. i will do the touch test on the wires.
__________________
1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
1995 E300D Handed down to daughter
2006 CDI Wifes

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  #4  
Old 08-04-2014, 12:09 PM
Jeremy5848's Avatar
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I agree with ichris93—sounds like a low-voltage problem. If the battery itself is OK, check the battery wires, the main distribution block squeezed in between the battery and the shock tower, and the main engine-chassis ground cable (underneath the car at one of the transmission mounting bolts). If the cars cranks and starts easily then it's probably not that part of the wiring, the heavy stuff. In that case, check the add-on 30A strip fuse for the blower and all of the fuses in the fuse/relay box. Don't just look at them, remove each one, make sure the ends are not corroded and check the fuse clips too. If any of the fuses are aluminum change them to copper.

Jeremy

EDIT: If the tach works it's not the OVP relay.
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Last edited by Jeremy5848; 08-04-2014 at 12:10 PM. Reason: Add more information
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