exactly what battery voltage do you have when running?

i have fixed a lot of abs or srs and/or lousy running by replacing the ovp relay. yours is REALLY old because the 2 fuse relays have been around for 20 yrs. replace the relay with oe from mb. the kaehlers and uros that are out there cause problems out of the box.

when checking abs sensors, you need to scope them while the wheel is turning. resistance doesn't imply correct voltage signal. given your light never goes out, i'm betting it's not the sensors. replace the relay and cross your fingers. good luck, chuck.

Hi guys, quick FYI: After receiving complaints (hat tip to Mr. O'Brien on B.W. for his detailed feedback), in 2018 we made several design changes to URO Overload Protection Relay relay 201 540 3745. We made the circuit board traces wider to handle heat better, and added plastic insulators to prevent PCB-to-metal-case shorts.

In fact, if you check the verified buyer reviews on that big "jungle" online retailer, we received all 5-star reviews in 2019 and 2020 for our updated OVP relay 2015403745.

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I received a new KAE OVP relay today and installed it this evening. After installing the new relay, I started the car and I still have the ABS light illuminated and a 1400 rpm idle.

I did do both a resistance test (ohms) and a AC voltage (while spinning the rotor) test on each sensor. I was told in another thread that if you just start the car without moving it the ABC computer does do a check on each sensor without the car moving and in theory if everything is up to spec then the ABS light should go out without actually moving the car.

you got a kae, kaehler, relay. i'll say it again, i've had trouble with them brand new.