There are 2 thick wires connected to the alternator. One goes from the Alternator to the Glow Plug Module, the other runs from the Alternator to the Starter Motor (Basically the Battery). I'm not sure where the join is but you need to check that the thick wire from the Alternator to the Starter/Battery has not fused.
Ah bad news. Had new alternator, tensioner and belt. IT hass cleared the alternator code, also fitted new glowplugs, which again has cleared them codes. It has sso far cost me £539 to find out it wasn't alternator or voltage causing gearbox to slump into limp mode. Last few days it has been very good and not messed me about until yesterday when it went into limp mode again (349.9 miles) since new alternator it took 19.1 miles to start messing about. Bit unhappy as now it is a gearbox out job to change elctro-plate on valve body. Chrysler specialist says his mate "Jim" can do it for £400, will book it in with him for when I go on holiday in 4 weeks time so he can have it for a week.
At least I am whittling the problems down : ( just expensive way to find out it isn't the fault
Drop the transmission pan, pull electrical plug, pull filter, unbolt valve body and remove... Conductor plate clips on. Maybe an hour to remove if you've never done one before, then it's just bolt it back together in reverse order, fluid and jobs a good one.
Sounds like someone is taking you for a ride. Four hundred quid isn't bad if they are including fluid and the plate, labor only it is a little steep imo.
So the same thing happened to mine after replacing the alternator with a (new one) the car started acting weird the lights on the dash kept coming on and off as well as the windshield wipers. I than replaced the alternator with a used one from the junk yard to get an idea of what the issue may be. And after I put the used alternator along with a new battery the lights on the dash came of and the windshield wipers weren’t going crazy but I still had a battery light on. ??♂ if anyone has any info please let me know