I was having trouble with my electrical system last year, eventually got fixed:
Reported: “We ran a new wire from the fender ground point to the earth terminal of the battery and everything worked as it should and, no warning light illuminated.”
New problem this year, almost identical to last year:
Last summer I got my 1956 Mk 1 electric issues sorted out (reconnecting unlabeled wires behind the dash, reconnecting wires to lights and several other places, re-configuring the fuse block to put the wires where they belong, fixing ground problems.)
I recently removed the speedometer. The only wires I disconnected were 4 ground wires at an attachment point at top of panel and pulled the indicator light bulb holders for ignition and headlights from the speedometer. Speedo has now been reinstalled. Ground wires and bulb holders reattached. Instrument Panel is back in place.
I thought it prudent to put a test light between battery ground post and ground strap to make sure everything is still working. Test light indicates electric system problems. Any suggestions to remedy the following faults would be greatly appreciated:
Door activated courtesy lights: dim when door opened, dim test light.
The following happens when I have key on:
Starting carb Solenoid clicks, test light dim, IGN light starts bright, then dim.
Activate fan switch: no fan, bright test light, IGN light goes off, petrol gauge goes to 0.
Activate interior light switch: bright test light, dim interior light.
Activate panel light switch: nothing.
Activate horn: weak sound, bright test light
Activate headlight switch, position 1 & 2: bright test light, nothing at sidelights or headlights.
At the fuse block, key off, I have 12.5v at A1, A2: with key on I have 8.5v at all fuse block connection points.
As I mentioned, some of the above electrical faults are the same as last year. I’m going to check the ground wire I added. Any suggestions are appreciated