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I have an 89 740GL that had a number of problems with loose connections
at the fuseblock. Here's some tips:
wiggling relayssolves or causes problems- then see below- loose connections
You can cut a NEW fuse in half so that it becomes a guage - try iy in each position to see if the lug is loose! beware of the cruddy replacement fuses
you want quality Buss or Littlefuses
I replaced all of my fuses since they get worn the legs get shaved some with every insertion, use a little dielectric silicone grease on all of your
fuses too to help prevent corrosion/oxidation
Many of the relay socket lugs and Fuse block lugs get loose
(prob when they are yanked out carelessly instead of being
pried out carefully)
I made a nice pin tool to release the relay and fuse lugs from the sockets
out of a stainless 10 speed bicycle spoke, you just need a thin flat
tool to slide down and press the little locking tabs to release the pins.
the end looks like a tiy screwdriver perhaps 1/16" accross
You can squash the loose lugs back with pliers or vise grips, being careful so that they are not too tight. Then I soldered many of the crimp leads at the lugs, as some of the lugs were loose at the crimps.
My fuseblock was mashed badly by previous repairs so I replaced the
fuseblock with one I found at the boneyard. I'm still amazed that they
can feed 30 amps through the lightweight connectors.
I am still looking at the wiring harness below the intake manifold
and wonder if there's any quality wire loom or stuff to protect it from heat.
IPD says that there's some problems with old harnesses.
If you are blowing bulbs then get a voltmeter on your bulb socket and see if \
your voltage is over 14 Volts with the engine revved. Bulbs crash with high voltage.
maybe your voltage regulater is messed up, thats a separate problem.
Good luck,
B.B.
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