LJRockstar
NAXJA Forum User
- Location
- Hunterdon County, NJ
Well Murphy's law seems to have struck tonight... I'm supposed to be headed out for the weekend from work tomorrow in the XJ. Last order of business for today was to hit the carwash. One of the drive thru ones, not a do it yourself place. I get back in to drive home and load up gear and now the alternator doesn't seem to be working. I got max 12.0dcv on the voltmeter on the drive home. I can only assume that something got wet in the car wash and optimistically it'll dry out by morning and everything will be fine. Realistically, I doubt that will happen.
The XJ is a 1996 with the 4.0 HO engine. It has a brand new Odyssey battery, brand new 2ga battery cables, I'm pretty confident all the engine/body/chassis grounds are good. I've been DD-ing it for about 2 months now with no troubles. typically with no accessories powered up I get an indicated 13.8vdc when driving which is probably more like 14.0~14.2 at the battery terminals with a proper multi-meter if I could actually check while driving. When the A/C blower in running on high that dips to between 12.2~12.6vdc
I did a few tests, tried the ol' tap the alternator to free up the brushes trick. tested all the fuses in the underhood fuse box everything comes up good. got underneath with the multi meter. I have battery voltage at the output cable, but not at pins 1 or 2 in the diagram below. they were both at less than 1vdc.

Can anyone tell me what sort of voltage I should see there?
Has anyone experienced a situation like this before?
Is there maybe a fuse that popped that is not letting voltage get to the field coil?
Any knowledge/help would be greatly appreciated!
The XJ is a 1996 with the 4.0 HO engine. It has a brand new Odyssey battery, brand new 2ga battery cables, I'm pretty confident all the engine/body/chassis grounds are good. I've been DD-ing it for about 2 months now with no troubles. typically with no accessories powered up I get an indicated 13.8vdc when driving which is probably more like 14.0~14.2 at the battery terminals with a proper multi-meter if I could actually check while driving. When the A/C blower in running on high that dips to between 12.2~12.6vdc
I did a few tests, tried the ol' tap the alternator to free up the brushes trick. tested all the fuses in the underhood fuse box everything comes up good. got underneath with the multi meter. I have battery voltage at the output cable, but not at pins 1 or 2 in the diagram below. they were both at less than 1vdc.

Can anyone tell me what sort of voltage I should see there?
Has anyone experienced a situation like this before?
Is there maybe a fuse that popped that is not letting voltage get to the field coil?
Any knowledge/help would be greatly appreciated!
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