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Old 06-09-2002, 06:32 PM
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Join Date: Mar 2000
Posts: 517
R129 Wire Harness Replacement - Labor Estimate?

Anyone have an idea (or care to quess) as to how much time would be required to renew the headlamp cable harness (#129 540 22 05) on a '91 500 SL?

This "U" shaped harness contains 24 connectors, originates in the engine compartment fuse/relay box (4 connectors) and runs behind the primary firewall, underneath the harnesses in the electronics bay and along the left and right sides of the engine compartment. The harness contains the bumper-mounted ambient temperature sensor and powers items such as the front parking lights, headlamps, headlamp wiper motors, horns, and engine coolant level sensor.

Both headlight assemblies would need to be removed, as well as (but not limited to) the engine coolant expansion tank, washer fluid reservoir and the firewall access panel. TIA.
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Old 06-09-2002, 10:03 PM
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Join Date: Jul 2000
Posts: 638
wiring harness replacement time guess

It would take at least 8 hours, more likely 12 of good tech time to remove and replace all the stuff needed to remove and replace the headlight wiring harness.
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Old 06-10-2002, 11:19 AM
elau's Avatar
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Join Date: Nov 1999
Location: MD.
Posts: 1,725
Just curiou as to why you need to replace the wiring harness? Does it show signs of wear or you have electrical gremlins? I have noticed lately this subject has been brought up by other SL owners. I have a '95 and would like to know if I should be on a look out. Thanks.
95 R129
04 Infiniti G35.5 BS
10 X204
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Old 06-10-2002, 11:53 PM
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Join Date: Mar 2000
Posts: 517
The engine compartment wiring was damaged by rats during the vehicle's winter storage.
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