E39 Electrical Gremlins.. GM, Ignition Switch or Grounding Issues?

[MISS BM 712]

Where should I start the list of issues.. This car is about as temperamental as a teenage girl, Guess it's showing it's age.

There is a fault code that came back - Cable Clamp R on GM3 (No idea)

So thought the General Module unit was responsible for the many hiccups it keeps having with the OBC and other things..

So, here is the list of issues, sounds like it could be ignition switch related too - if I'm thinking terminal R is related with the Clamp R and terminal R being Ignition switch related, Unsure.

- No Nav, TV, CD, Radio, it does very rarely work once the car is warm and making some funky sounds on the left hand side by glove box. (it just sits there on the main selection screen, not black)

- Steering Wheel adjustment - works when it wants too

- Visor lights - Work when it wants too

- Cruise Control - no luck unless the Nav/Radio system work, then it works.

- Interior Lights flicker on and off while driving - sometimes

- Airbag light, very dim flicker

- Dash controls (Range, Limit, Consumption) work when Nav/Radio work

- Back Blind - Works when Nav/Radio Work

Also a slight mild ticking vibration when the car ignition is on, on the gear shift...

So everytime I switch on car, just the basics works, Electric Seats, Air Con, Indicators, Headlights and so on. I have never had any problems with the locking of the car, even without having to stick the key in the door.

Once you have been driving for over 30 minutes and the car is nice and toasty, you might just be in luck for her to decide to give you some music and all your controls back, and just before that happens, the air bag light flicks on, goes off and waalaa, everything works 100%!

So, anybody got any idea.. Would it be worth looking into Ignition Switch?

[Neal 528]

I'd start with the basics . Has the battery drop a cell ? . Many of the modules listed have a minimum voltage before they will work reliably .

[MISS BM 712]

I'd start with the basics . Has the battery drop a cell ? . Many of the modules listed have a minimum voltage before they will work reliably .

Battery Holds charge really well. Check the other thread, I accidently (don't know how) duplicated this post :/

[yng_750 247]

Sounds like what i have seen with ignition switches. At worst you stop a future fault if its not the reason.