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Old 04-30-2003, 10:12 PM
Rod Rod is offline
Registered User
Join Date: Apr 2003
Location: Sunset, Louisiana
Posts: 57
ABS dash lite comes on and engine speed increases?

Why does occassionally the ABS dash light come on, suddenly the motor races and will stay up until I turn off the engine and restart, then the ABS light is off and the engine runs normal again.

It's a 1989 S420 SEL

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Old 05-06-2003, 02:52 PM
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Join Date: Jun 2002
Posts: 22
ABS light and high revs

I have the same problem. Anyone out there who can shed some light on it?

Thanks in advance.
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Old 05-06-2003, 04:50 PM
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Join Date: Jul 2001
Location: SoCal
Posts: 1,303
I believe, as on our W201, that both ABS and engine management computers are powered through the OVP relay. Bad contacts in this would be my guess as to the cause.

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Old 05-06-2003, 05:27 PM
Registered User
Join Date: Jun 2002
Posts: 22
OVP relay question

My OVP relay is part # 201 540 38 45 and has 5 poles with (1) 10 amp fuse.

Fast lane shows #P2056-18126 and it has 6 poles and (2) fuses.

Anyone got a handle on which one is correct for a 90 300se?

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Old 05-06-2003, 05:36 PM
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Join Date: Oct 2002
Location: Colorado Springs
Posts: 481
Classic OVP, The new part does indeed have 2 fuses.
Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)
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