I believe you are right here.
I had just this problem with the GT after resto - the only bit that wasn't
replaced. The problem went away with replacement of the unit. The fun bit is
trying to fix it back in - could do with a fibre optic camera on ones finger
71 MG Midget
From: Skye Poier [mailto:firstname.lastname@example.org]
Sent: 12 June 1999 19:45
Cc: MG Nuts
Subject: Re: Prince of Darkness strikes
Word on the street is that email@example.com said:
> On the way to a show this evening both the fuel gauge and temp. gauge
> decided to go to sleep. Both indicating at the deenergized positions. I
> checked all the fuses and all appear good. Is there a common connection
> point that feeds both gauges?
If I'm not mistaken, this is the sign that your voltage regulator
has gone south.