ZR-1 Net Registry Forums - View Single Post - Photo request of ABS well for 1991. Here's mine.

Torchred96 · 02-08-2015

Thanks for the link to your article Hib, it was one of the first ones I read and it took the mystery out of the abs brakes..and gave me some courage too

I ended up taking out my modulator and harness. There were 3 broken wires..the orange one to the over voltage relay was corroded and was just hanging there, the main power lead had been spliced with a non factory connector and it wasn't crimped properly and broke (or was ripped off intentionally) loose and finally a third wire was snipped..i think to turn of the DIC light. Oh yes, the ECBM itself was not connected either, just laying on top of the connecter. My pump motor had rusted to death, so I took it apart in the name of science. While I had the harness out, I took the old tape off and re-taped the whole thing as it looked ratty.

I found that the corvette modulator, which looks identical to many others is around 250 to 300 on ebay, and even though I ordered one at that price, the seller emailed me to say he sold the one he had listed locally...so I bought a look-alike from 1994 mercedes e320 (a lot of other cars use a similar almost identical modulator/pump up to around 1997 or so even though they changed ours in 92) at a shipped cost of $35 The model from the mercedes was #265 200 043 and the one I swapped out was 265 200-059. There was a difference in the wiring plug, but I just swapped out the black electronics square box that holds the solenoid relay, motor relay and connector with the corvette plug and also swapped the feet (rubber shocks). If it doesn't work, I'll chalk up the 35 bucks to lesson learned, But I figured it was worth a try. The solenoids, motor and fluid connections are identical.

I'm still waiting on my braided M/C line but I was anxious to see if it was going to fire up..so I used the emergency brake to stop. With the key on, the ABS light, EBCM and associated relays clicked to life and went out after the appropriate 4 seconds. I backed the car out of the garage and about 20 feet later I heard the abs pump complete the test for the first time in probably over 10 years. I know some people hate it, but it makes me happy when things work the way they were designed..or better. Hopefully it will all work when I get the system bled (borrowing a tech 1a from a friend) after the MC line is connected. I'll keep you posted.

02-08-2015	#3
Torchred96 Join Date: Jul 2011 Location: Homestead, Fl Posts: 247	Re: Photo request of ABS well for 1991. Here's mine. Thanks for the link to your article Hib, it was one of the first ones I read and it took the mystery out of the abs brakes..and gave me some courage too I ended up taking out my modulator and harness. There were 3 broken wires..the orange one to the over voltage relay was corroded and was just hanging there, the main power lead had been spliced with a non factory connector and it wasn't crimped properly and broke (or was ripped off intentionally) loose and finally a third wire was snipped..i think to turn of the DIC light. Oh yes, the ECBM itself was not connected either, just laying on top of the connecter. My pump motor had rusted to death, so I took it apart in the name of science. While I had the harness out, I took the old tape off and re-taped the whole thing as it looked ratty. I found that the corvette modulator, which looks identical to many others is around 250 to 300 on ebay, and even though I ordered one at that price, the seller emailed me to say he sold the one he had listed locally...so I bought a look-alike from 1994 mercedes e320 (a lot of other cars use a similar almost identical modulator/pump up to around 1997 or so even though they changed ours in 92) at a shipped cost of $35 The model from the mercedes was #265 200 043 and the one I swapped out was 265 200-059. There was a difference in the wiring plug, but I just swapped out the black electronics square box that holds the solenoid relay, motor relay and connector with the corvette plug and also swapped the feet (rubber shocks). If it doesn't work, I'll chalk up the 35 bucks to lesson learned, But I figured it was worth a try. The solenoids, motor and fluid connections are identical. I'm still waiting on my braided M/C line but I was anxious to see if it was going to fire up..so I used the emergency brake to stop. With the key on, the ABS light, EBCM and associated relays clicked to life and went out after the appropriate 4 seconds. I backed the car out of the garage and about 20 feet later I heard the abs pump complete the test for the first time in probably over 10 years. I know some people hate it, but it makes me happy when things work the way they were designed..or better. Hopefully it will all work when I get the system bled (borrowing a tech 1a from a friend) after the MC line is connected. I'll keep you posted. Last edited by Torchred96; 02-08-2015 at 10:43 PM.