[quote=âAussieEtype, post:11, topic:432581, full:trueâ]
âŠDidnât quite go to plan as the electrics on a 48yo car can play up and often the gauge did not switch but soon learned that a few hits of the switch would eventual move the gauge to the right tank.
[[/quote]
The changover switch has two separate functions, Gary - one; it switches the gaugeâs connection, groundâ to the respective tank. âInâ for âleftâ and âoutâ for right - be aware that the gauge is rather sluggish in reactingâŠ
The second function; it connects power, switch âoutâ, to the return and changeover valves - setting them up to the ârightâ tank. With the switch âinâ there is no power through the switch - sort of âoffâ position.
The white band is of course only visible with the switch âoutâ - however itâs easier to see/feel if the switch is âinâ or âoutâ, than to look for the white band (and works at night, but a light is then better)âŠ
The most common fault with the switch is that it fails to latch in the âinâ position - this can be âfixedâ temporarily by jamming it with a thin strip of cardboard. However, as Aristides say, a switch fault require replacing the switch - and/or attending to the lighting.
The two functions are electrically separate and may fail individually - one is detectable by observing the gauge (if fuel levels are different). The other detectable by listening to fuel return at the tanksâŠ
The 12V cigar lighter is fused with some other items - it may blows if the lighter is âmishandledââŠ
Non-working switching is usually with the switches themselves. The windows are fused with thermal fuse - which initially connects - then âbreakâ power with overload, then resets. Central locking may be similarly fused - but also, if you have the solenoid set-up; two relays are involved. So what are the exact symptomsâŠ?
Frank
xj6 85 Sov Europe (UK/NZ)