When looking for blowing fuses it is a good idea to replace the fuse with a
12v lamp, which will glow at or near full brightness, then keep pulling
connectors till the lamp goes out.
PaulH.
-----Original Message-----
From: xyzabcde@earthlink.net <xyzabcde@earthlink.net>
To: Cullit@aol.com <Cullit@aol.com>
Cc: mgs@autox.team.net <mgs@autox.team.net>
Date: 09 February 1999 05:37
Subject: Re: Fwd: mgs@autox.team.net digest #1465 Thu Jan 28 02:05:03 M
boundary="part0_918430359_boundary"
>Phil said:
>
>> I own a 69mgcgt with a electrical problem. The car was stripped down,
>> painted, engine brakes, suspension, and floor pans renewed. If I want to
start
>> it I have to attach an accessory ground from the battery to the back bolt
>> holding the starter to the engine.
>
>I've heard this one before, with the accompanying frustration level. The
>starter grounds by contact with the engine backing plate. If your paint
job was
>too good, there's no metal to metal contact. Remove the starter and scrape
off
>the paint where it touches the backing plate. Hopefully, this will fix
your
>problem.
>
>> If I remove a
>> double green lead from the near side of the lower fuse, it doesn't blow.
>
>I assume that you're saying that the fuse does blow if this wire is
connected.
>With the battery disconnected, check to see if this wire is grounded by
using an
>ohm meter connected to the wire and the chassis. If there are 0 ohms, the
wire
>is shorted to ground. If none of the exposed parts of the wire are
obviously
>grounded, the insulation could be melted inside the harness sheathing and
the
>wire is grounding through another wire. The way to find this is to
disconnect
>the ends of all of the wires near this one and check with the ohm meter to
see
>if they are connected. 0 ohms means they're connected and infinite ohms
means
>they're not.
>
>If you have melted wires, it is possible to isolate and replace the
offending
>wires without replacing the harness. Aside from finding your immediate
>problems, it's also a good idea to clean all of the grounds on the car.
>
>To find the battery drain on your 74B, connect a voltmeter in line with the
>battery. To do this, disconnect a battery cable and hook one clip of the
>voltmeter to the cable and the other to the naked battery terminal. Make
sure
>all electrical consumers are off (doors shut, radio off, ignition off,
etc.).
>With this setup, electrical consumers won't work (e.g. lights won't shine)
but
>they draw current. If the voltmeter shows any voltage, this is your draw.
>Disconnect electrical systems one by one until the voltmeter shows 0 volts.
>When this happens, you've found your draw. Remove components from the bad
>system one by one to find the culprit.
>
>Don't give up on these cars! All problems have a cause that can be found
and
>fixed, usually fairly cheaply. If these suggestions and others' don't
help, ask
>again.
>
>Good luck!
>Denise Thorpe
>
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