4k In A E7

[Captain_Fantastic]

Hey guys.

 

This is the issue. The car has been munching my battery. after about 3 seconds of fault finding i find that the alternator is in fact not charging my bat. First thing i check is the fuse able links. which were stuffed. so i fix this. Buuut issue is still there. So i get my batt tested. In case that is the issue but its fine. Then i realize my charge light doesn't come on. So i look over the alternator and turns out the wire for the exciter circuit isnt connected to the plus anymore. so i crimp a female blade onto the wire and connect it back up.

 

This seems to fix the issue as the charge light came on when you put the ignition to on, but stayed on after you started the car. i thought this might be ok and i would just have to deal with it but after going for a test drive it became clear that it stil wasn't charging. on the test drive we went over a bump, then the light went out and the charge circuit started working. but abruptly a little while later the light came back on and the car died

 

I am racking my brains trying to think of what to do. need the car for work so i don't have time to strip the loom and find out or do days of fault finding. and atm gunna have to be a bit of a backyard fix till next week. I'm thinking maybe a switch on the wire for the excite wire. turn it on to start the car. then once its on turn it off? i have no idea here. ;)

 

any help would be very much appreciated.

 

Cheers.

Jack

 

ps sorry for the fail typing i have been awake for ages. very tired :)

[Taz_Rx]

You sure the alt is actually making charge like it should?

[Captain_Fantastic]

yes the test drive was at night. once we went over the bump the lights became much brighter the engine would rev again rather then just splutering from lack of spark and we could use the radio again. since the battery i was using was getting very low it was quite easy to tell when the alternator kicked in.