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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 07-20-2013, 03:07 PM
Phoenixpaddler Phoenixpaddler is offline
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Location: Victoria, BC
 
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Mein Auto: 98 Z3 M-Sport
Z3 M Coupe - Electrical problems

I just purchased a Z3M coupe yesterday and noticed last night when driving that neither the instrument panel nor driver side rear and front markers don't work. I have checked the bulbs in question with a DVM and replace one which was burnt out. I have also cleaned the contacts and checked for voltage at the bulb connector and at the harness with not luck. I also checked for severed wires at the harness that is connected to the trunk lid and it looked fine also.

On reading previous posts on the dash lights I will just order a replacement switch from BMW.

Any help would be appreciated.

Cheers
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  #2  
Old 07-20-2013, 08:15 PM
marty505 marty505 is offline
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Mein Auto: 99 Z3 M Coupe/99 540i
I suspect someone has been in the dash. The left side running lights are are powered from the same contact on the headlight switch (right side looks to be a different contact, same switch). The light switch also lights the instrument cluster lights. I'd take a look at the head light switch. Could be a bad headlight switch, or maybe just a loose connector.
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Old 07-20-2013, 11:09 PM
Phoenixpaddler Phoenixpaddler is offline
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Mein Auto: 98 Z3 M-Sport
Thanks Marty.

I will replace the headlight switch assembly for I did check the wires to the shifter knob and they were frayed. I will post my results after replacement. I hope to get this wiring issue behind me so I can start enjoying the car!
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  #4  
Old 07-21-2013, 07:36 PM
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Randy Forbes Randy Forbes is offline
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Before you replace the hdlt switch, VERIFY that the gray w/red stripe wire is NOT shorted to ground! The rheostat in the switch WILL BLOW before the fuse that's supposed to protect the circuit.

Most obvious location is @ the shift knob; knob gets pulled off during a quick shift, and jammed back on while keeping an eye on the road__crushing the insulation in the process.

Or, in the case of my own gray car, you pinch the gray w/red stripe wire when reinstalling the console! Since I always kept the instrument panel light on full brilliance, I soldered a jumper across the rheostat terminals (ON the switch). I bought a new switch about five (>5) years ago, but it's still in the box, haven't put it on the car yet.
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Old 07-21-2013, 10:19 PM
Phoenixpaddler Phoenixpaddler is offline
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Mein Auto: 98 Z3 M-Sport
Thanks Randy for your reply. Upon checking the shifter knob it appear the insulation on the wiring had worn away leaving bare wires exposed. The local BMW dealership wants $70 for a replacement switch so I may just try your suggestion on jumping the terminals on the rheostat. I am sure there is a post on it somewhere.

Cheers,

Ken.
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