I'll second the voltage stabilizer as only these two gauges use this device.
Looks like Vic has provided some good info.
----- Original Message -----
From: <Vemarooski@aol.com>
To: <therays@ellijay.com>; <mgb-v8@autox.team.net>
Sent: Friday, July 06, 2007 3:33 PM
Subject: Re: Electrical Problems
> Jim- Could be the voltage stabilizer on firewall ( turns 12V power on and
> off about 3 times a second to stabilize the gauge readouts), fuse, or
> ignition
> feed. First check the fuse block on the passenger fender engine
> compartment.
> Assuming that's good to go, then with ignition on, and lights off, check
> for
> voltage using a 12V test light on the green wire to each of the gauges.
> If
> you have voltage swinging from 0-10V or more, you prolly have a ground
> interupted. If no B+ voltage, then check the input wire on the stabilizer
> located on
> firewall about behind the tachometer. You might want to take the tach out
> (
> push in hard and twist L or R 60* or so to hit he bung hole and slide the
> unit out). Let me know huh? Regards, Vic
///
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