[Vermont Caddy]

DTS has 73,000 miles no accidents, in overall good condition. Issue started as intermittent, would trigger ABS/TC dash lights only after hard acceleration from stop. Scanner confirmed, what I was feeling, left front ABS. Did some driving tests with scanner, decided to replace wheel bearing/ sensor. After bearing replacement dash lights and code are hard set, on all the time. I checked wheel sensor continuity and AC voltage at sensor, both within guidelines. I then checked continuity from EBCM connector to wheel sensor, no resistance, even when pulling and twisting wires. Next test was for zero volts,( key on, using EBCM ground terminal) checking both wires from EBCM connector, received around 4 volts on each wire. Scanner tells me to repair short to voltage in sensor signal circuit or the low reference circuit . So, without dropping engine to gain access to remove wires from plastic looms how do I find shorted wires. I also measured for infinity ohms of resistance between the wheel speed sensor signal or the low reference circuit and ground at EBCM connector, tested good. Thanks in advance.

 

[Omac]

follow the loom look for any rubbing of the loom against the engine. start there for bare wires touch to ground.

 

[Vermont Caddy]

follow the loom look for any rubbing of the loom against the engine. start there for bare wires touch to ground.

Thanks

DTS has 73,000 miles no accidents, in overall good condition. Issue started as intermittent, would trigger ABS/TC dash lights only after hard acceleration from stop. Scanner confirmed, what I was feeling, left front ABS. Did some driving tests with scanner, decided to replace wheel bearing/ sensor. After bearing replacement dash lights and code are hard set, on all the time. I checked wheel sensor continuity and AC voltage at sensor, both within guidelines. I then checked continuity from EBCM connector to wheel sensor, no resistance, even when pulling and twisting wires. Next test was for zero volts,( key on, using EBCM ground terminal) checking both wires from EBCM connector, received around 4 volts on each wire. Scanner tells me to repair short to voltage in sensor signal circuit or the low reference circuit . So, without dropping engine to gain access to remove wires from plastic looms how do I find shorted wires. I also measured for infinity ohms of resistance between the wheel speed sensor signal or the low reference circuit and ground at EBCM connector, tested good. Thanks in advance.

Thanks, I've been doing that to no avail.
Suddenly I have bigger fish to fry. I put everything back in place to use the car....now I have, no crank, no start, no scanner communication. Turn the key to crank, dash lights up, needles sweep, I have body functions; lights, radio, blower motor., etc.. Fuses test good with test light and key on. I've swapped a few relays with same in fuse boxes. The only thing I did to the car prior to no crank, no start was dealing with code C0035, testing the harness to wheel speed sensor and also the EBCM harness and connector. I did clean the 3 grounds located on the transmission bell housing and the engine to chassis ground located by the under hood fuse box. All test good with multi meter. I've got the drivers lower dash pad out looking for broken wire from ignition switch. Any ideas? Thanks

 

[Omac]

Electrical issues are a pita. I would retrace everything you did and touched. It has to be something you did as the car ran before you tried to diagnose the original problem. I'm thinking that it's in the engine harness as you moved it looking for chafing. Probably more than one wire is damaged. I have a wire tracer that tones it makes finding the wire very easy. Using that you should be able to find the issue.