Hello Chad
Usually VW does both in modern cars, connect both to chassis and run a
brown wire. Even body grounds can have surprising resistance. Having the
wire there makes individual points redundant. Any wire that gets hot should
be looked into. Often it is not the wire but rather the lug/wire
interface. The copper wire is quite conductive of heat so it gets hot for
quite a distance from the lug. Also, for reasons totally unknown to
me, The wire VW uses can sometimes develop a rather high resistance. Best
thing is to go around with your voltmeter and measure the drops across
wires, lugs, connector pins, etc and see where the voltage drop
occurs. Use a needle or something sharp to access the wire about an inch
from the lug. A systemic approach to finding the actual problem then
replacing the deficient interface will keep the lights bright and the
blower blowing hard.
Lotsa Luck Eric
85 GTI with VR6 Power
At 08:37 AM 7/9/03 -0400, Chad Rebuck wrote:
I have replaced the stock battery terminals and run some additional ground
cables to the engine and body. I've noticed that a ground wire (maybe 8 -
10 gauge) is connected directly to the battery, which I think comes from
the fuse/relay block ground terminal. This wire gets hot when the ac fan
is on speed 3 or 4. Why would vw run a separate ground connection instead
of grounding to the chassis or ground point next to the fuse block? I am
suprised the insulation on this wire is still there - maybe it is because
more current is flowing through the system with my upgraded connections at
the battery?
Chad
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