Hey Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
philman
Jedi Knight
Offline
I had an odd problem with my dash + instrument panel illumination on my DHC. <span style="text-decoration: underline">I had right side marker lamps</span> but no dash or instrument illumination. The fuse for the Right marker lamps and dash illumination was good by ohm check and had +12 volts on both sides of the fuse.
I had 12 volts at the rheostat when the dash lamps were disconnected. I could also light the dash lamps if I powered the circuit from an outside power source.
Very odd. I replaced the fuse. All good now!!?? Put the old fuse back in and it was bad again. Must be a high resistance short in the fuse (ha ha ha) not allowing enough current flow to drive the dash lamps in addition to the marker lamps. Oh, this is a 1981 TR7 FI/non-AC wiring circuit, but that part of the diagram is the same for all versions.
I had 12 volts at the rheostat when the dash lamps were disconnected. I could also light the dash lamps if I powered the circuit from an outside power source.
Very odd. I replaced the fuse. All good now!!?? Put the old fuse back in and it was bad again. Must be a high resistance short in the fuse (ha ha ha) not allowing enough current flow to drive the dash lamps in addition to the marker lamps. Oh, this is a 1981 TR7 FI/non-AC wiring circuit, but that part of the diagram is the same for all versions.