88 MB 420 SEL ABS Light and Hi Idle

Apr 19, 2004 11 Replies

Can anybody give me a hint on why my 88 420 is idling hi (about 15 - 16 on the tach) and the ABS light comes on, I have checked all sorts of connections and have came up with nothing. Tim



Check the fuse on top of the Overvoltage Protection Relay.

Bill Ditmire Ditmire Motorworks,Inc.

425 White Horse Pike Absecon,NJ 08201
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609-641-3392

Thanks Bill, I will check that tonight, can you give me a general area of the overvoltage P.R. location. Tim

Thanks Bill, I will check that tonight, can you give me a general area of the overvoltage P.R. location. Tim

Thanks Bill, I will check that tonight, can you give me a general area of the overvoltage P.R. location. Tim

Checked the Overvoltage protection relay fuse (10 Amp) on the fire wall beside the brake booster....it was good, I started the car back up it ran at about 9 on the tach (about normal), I turned it off and started it back up and the idle went up and the ABS light came back on....any other ideas????? Tnx, Tim

The OVP relay itself is suspect- it powers those systems.

Bill Ditmire Ditmire Motorworks,Inc.

425 White Horse Pike Absecon,NJ 08201
formatting link
609-641-3392

Thanks Bill, Can you tell me where I can find one and a ball park price for it? Do you sell them by chance?

Thanks again Tim

Call tomorrow 877-348-6473... have your VIN no. handy. Bill Ditmire Ditmire Motorworks,Inc.

425 White Horse Pike Absecon,NJ 08201
formatting link
609-641-3392

Thanks Bill, I will get the VIN and call you this evening or Wed. You have some really nice autos, I was looking at your web site earlier today....WOW!! Thanks again for the help. Tim

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