[Mgs] New Wiring Harness

Paul Hunt paul.hunt1 at blueyonder.co.uk
Mon Apr 12 01:53:48 MDT 2010


Quite probably a short on the red wires, as they weren't fused until 67. 
You need to find and fix the source of the short otherwise a new harness 
could go the same way.  The usual cause is metal boxes or tools rattling 
around in there, often damaging the wires at the back of the lights (not 
part of the harness).  The rear harness is a bigger job than the main 
harness in my experience as there are so many clips and fastenings.  A short 
that far back can also burn the main harness, but if the damage is only 
localised I'd be inclined to repair rather than replace, a full harness 
replacement is a big job.  What I *would* do is insert inline fuses in the 
red wire where the rear harness joins the main harness by the fusebox, and 
also in the white wire feeding the pump.  Both my cars and two I have worked 
on have had shorts in the pump that has damaged both harnesses.

As far as the wiper motor is concerned things are very confused around 66 
and 67, and the roadster is different to the GT.  There seem to be at least 
three if not four motors, switches and wiring arrangements about that time 
while it was changing from square single-speed to round two-speed, you need 
to be sure what you have before you can plan for an upgrade.

PaulH.

----- Original Message ----- 
> After realizing that this "could" have started a fire, I decided to
> install a new harness.
>
> 4) While I'm completing this project, what else should I consider doing?
> I've thought about changing my wiper motor a newer 2-speed wiper (this is 
> a
> daily driver)


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