AC/911's

So I took ECU out of a 93 964 to use in another 93 for a Minute, put back in & ABS light is on & Speedo does not work? Car runs fine, disconnected battery , ECU, still no change, Put Speedo back in Other Car works fine, back in Original car, lights up, but not speed or miles register & ABS light on, What are the chances it just started an ABS problem?

Tech came out with 2 Diagnostics & could not reset ABS system & get light to go off?

ANY HELP would be appreciated, Thanks

BigKraut

Have you tried replacing the ABS relay? Years ago my ABS light came on and the speedo quit working (and the odo, too?). Turned out to be a failed relay.

AC/911's

Will check that, Thanks

J richard

Hammer time...get a reset. I had the same problem thats all it took.

AC/911's

Hammer was a no go as I said, however, switched relay 33 (r33) & 34 (r34) & problem Fixed, Thanks for the help

AC/911's

closing