Search the Community

Been searching the forum for answers to my problems but have been unable to find one. 73 240Z complete tear down and rebuild. Working on reinstalling the dash and electrical. Trying to check out as much as possible before moving on. I've connected a motorcycle battery to the main electrical cable in the engine bay (that normally connects to the battery cable) for testing purposes. I did a pretty good job of marking all wires and plugs to facilitate reconnecting. Also I installed a new ac/heater system that had its own wire harness. I only had to use one 12V switched wire from the original harness and the blower motor control switch. So now I have two current problems. Most all the instrument lights work but they come on as soon as the ignition is turned on. The switch on the multipurpose switch has no effect on the instrument lights. The rheostat does control the intensity. The second problem is that the 3 instrument lights on the heater control panel do not work at all (bulbs are good). I'm wondering if the multifunction switch is bad. I bought this as a project car that ran but never paid any attention to the instrument lights. All other electrical devices worked. If it's the multifunction switch, I'll replace it, but I know they are pricey, so I don't want to spend the money and have the same problem. I suppose I could splice into one of the other instrument wires and run power to the heater control panel lights, but I will still have the problem with the instrument lights not being controlled by the light switch. This originally was an automatic trans being converted to manual shift (not sure that has anything to do with it but I'm stumped). Thanks in advance for your assistance. Paul (z3beemer)