Phil94850 Posted September 1, 2014 Report Share Posted September 1, 2014 I decided to open up my ABS module and re-solder the joints. As you can see in the pic below with the pump motor plug unhooked im getting about 9 volts, but.. when I plug the pump motor plug back in and probe the wire going to the motor im getting nothing. I used jumper wires from the battery and ran 12v constant to one side of the pump motor plug and a ground from the battery to the other side of the plug and the pump motor comes on. That's why I think the module must ground the other wire to make the pump run when it needs to.. My question is.. should I get constant voltage thru the plug to the pump or does it stay zero volts until the module activates it by grounding the other wire ? Trying to figure out if I have a bad plug or what ?? did the test procedure per Midwest ABS to check the ohms between the ABS connector and the wheel sensors.. all sensors should ohm between 900-1380. My wheel sensors all showed good except the right rear.. LF- 1129 ohms RF- 1155 ohms LR- 1123 ohms RR- 0 ( I guess bad sensor or wire problem ? ) Link to comment Share on other sites More sharing options...
mattwebb502 Posted September 1, 2014 Report Share Posted September 1, 2014 I would think that the driver supplies a low current all the time and monitors this to determine that the motor is plugged in and in spec. With this it can store a code for a defective motor and light up the ABS light to make the driver/technician aware of the issue. What you are seeing is probably normal. You will probably find that your ABS and/or TRACS lights illuminate on the dash when you put it all back together. After a short drive the module will determine the health of system and turn the lights off if everybody is functioning properly. Link to comment Share on other sites More sharing options...
Phil94850 Posted September 2, 2014 Author Report Share Posted September 2, 2014 thanks Matt... I agree I think the voltage is normal at the plug and with no ohms reading at my right rear wheel sensor I hope that's whats causing my ABS light. sent you a PM matt Link to comment Share on other sites More sharing options...
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