Electrical problems can be the most elusive problem in any vehicle. Often a
bad ground on any item can cause weird happenings. A turn signal can cause
all lights to flash or headlights to go out. When an circuit is searching
for a ground it can be through any filament or coil in the vehicle. The
best solution is to make sure that the frame, body, engine, etc is properly
bonded to the ground terminal on the battery. Cleaning ALL ground
connections is not always enough. Corrosion can invade any connection. An
easy diagnosis is to run a ground wire to any suspect light or gauge and
see if this solves the problem. My experience with restorations and repairs
also has discovered another problem that is difficult to solve. A given
wire can show twelve volts but the circuit does not perform. A single
strand in the wire can carry 12 Vts but no amperage. If your test for
voltage shows 12 vts bur will not work try a load test on the wire. You may
be surprised that corrosion or a break in some of the strands of wire may
not be allowing the circuit to work.
----- Original Message -----
From: <healeys-request at autox.team.net>
To: <healeys at autox.team.net>
Sent: Sunday, June 12, 2011 10:20 AM
Subject: Healeys Digest, Vol 5, Issue 385
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> 1. Frustrating Electrical Mystery (scott willis)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Sun, 12 Jun 2011 12:14:27 -0500
> From: scott willis <ahpowered at hotmail.com>
> To: <healeys at autox.team.net>
> Subject: [Healeys] Frustrating Electrical Mystery
> Message-ID: <BLU164-w14638EA52A666427F271B5B8660 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi gang,
> I was having a problem where my radio and my fuel gauge would go off when
> I
> applied the brakes. I installed a new brake switch and I still have the
> problem. I unhooked the radio. My wiper motor is not working and when I
> pulled
> that switch it did the same thing. I unhooked the wiper motor. It still
> does
> it when I hit the brake.
>
> Do I need to ground the wire going to the wiper motor or can I just leave
> the
> wires hanging to continue testing grounds? All lights, etc work. I get no
> brake lights when I hit the brake. I just get the fuel gauge going off
> when I
> apply the brake. It comes right back on when I release.
>
> Ugh....
>
> Thx
>
> Scott Willis
> Mashed 60 BN7 AH Club USA
> 59 MGA
> 66 E-Type FHC
>
> http://bgeuroclassics.webs.com/
> BG Euro Classics Car Club President
> Bowling Green, KY
>
>
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> End of Healeys Digest, Vol 5, Issue 385
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