Re: KPack's 1954 Panama

Posted by HH56 On 2020/9/12 18:38:06

The original TungSol flashers were fully thermal operated with relay contacts while the 535 is a hybrid. If you are still running positive ground the 535 will not flash the dash indicator because that lamp is driven by a transistor in the flasher which is the wrong type for positive ground. It will generally work the outside lights though because those are still worked by a thermal element in the flasher.

You might verify if you have power just to rule out any breaker or fuse issues. Also check out the grounds and any inline splice connections to all the light housings. Sometimes power flowing thru a bad connection will make the problem worse to the point of failure. The thermal element needs to see very close to the design spec resistance in the total circuit for it to maintain flashing. Even though you cleaned the switch that could still be the issue. If voltage and connections are OK it is possible the transistor was damaged by the wrong polarity and is loading the circuit enough that the thermal element cannot cycle or maybe even though new, the flasher just failed.

Here is a comparison of the two types of flashers. The top is the earlierTung-Sol with screw terminals rather than tabs but the internal parts are essentially identical.

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