DoctorPhate
NAXJA Forum User
- Location
- Ottawa Canada
My alternator is fine but its not charging, I was suggested by a mechanic that there is in line fuse for the alternator on my XJ.
Anyone know where this is?
Anyone know where this is?
The only bolt on an alt that's going to have power is the stud with the power wire on it. All other wires are grounds that are used for energizing the coil field for different power outputs that are controlled by the ECM. I'd pull the alt. and take it to autozone or another store of the like and have it tested. They can do a bench test on it and tell you if it's charging and working properly or not. If it's working fine then I'd check the fuses on the main fuse block under the hood as I think there's one there that's for the alt.
Sorry, yes a 97.
Unless the alternator output cable to the PDC has been replaced with plain cable, there will be a fusible link in it capable of handling the max amp of the alternator.
As the alternator output cable is horribly undersized, and should be changed out for a 4 ga cable, adding a marine-style fuse as noted above is the way to go, especially if you are upgrading to a high-output alternator.
Scroll down the page and check this article:
http://www.olypen.com/craigh/charge.htm
Uh, no, actually one of the small terminals receives power from the asd relay. No power there, no charge.
Correct. The ground side of the field coil is controlled by the engine computer. Time to start tracing back from the connector to see why it doesn't have power with the engine running. No check engine light? I thought the PCM would set a check engine light if the field coil didn't have power.
By "module on the wiring harness by the alternator" do you mean the black plastic part that screws onto the alternator? If so, as far as I know that's just a specialty molded connector to make sure you can't swap the field terminals accidentally.
Anyone know for sure?