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Tips

TR4/4A TR4 Ignition Switch ???

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TR4

TR4

Jedi Knight
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The TR4 recently died and all symptoms point to the ignition switch. No power in the on position or when trying to start but there is power when switched to accessories. Fuses are good. Should I check other items? The car was kind enough to quit in my driveway after a 50 mile trip to work and back. I can quickly get a NOS switch which has 6 spade connectors on the back as opposed to the 7 that my current switch has. The new switch is being offered as NOS for a TR4 so I guess it may be correct for a car without the radio. The spade connectors are not oriented the same as mine so I would have to test each one to see which would go to the starter solenoid and which ones work the accessories. Any way to determine which one should go to the coil or fuse box? Maybe I should wait for the replacement from Moss but of coarse none in stock and no idea of how long to get one and the Moss replacement may come with only 6 posts. TRF told me it was no longer available. All advice is appreciated.
 
Try Scott Harper at Team Triumph in Warren, OH. He may have a used one or a new one since he is a Moss distributor.
You may want to try other Moss distributors in case they might have one stowed away.
 
Well I think the original didn't use one of the 7 terminals so perhaps the 6 terminal version is okay. Would expect a few minutes with a multimeter would de-code the thing. ID your power input(s) (Brn/Blu) see what gets juice in 'accessory' pos (Green & possibly your radio) what gets juice in 'run' position (Whites) and what is hot in 'start' position (Wht/Red).

I have never opened up the ignition switch but have opened disassembled, cleaned & reassembled some other such as the headlamp switch. The contacts do get dodgy over time. You don't have much to lose by trying or even spraying some solvent cleaner (WD40) in there and working the switch (w/o power connected).
 
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