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Does heat effect a bad relay, solenoid or starter?
Thanks all for the advice. Happened again today, after leaving it alone for 3 hrs it started right up. Since I already have a relay I�ll start with that and then clean the solenoid. Even if it that seems to solve the problem I�ll still rebuild the starter
My 77 T3 did the exact same thing. Matteo was riding with me back from the Bay area and his solution was to kick the starter. So I turned on the ignition, held down the starter button and he kicked the starter. Not hard, just a good jolt. It cranked and started right up. My assumption is the ground wasn't the best and jolting it helps. Starters ground through the transmission mounting. I didn't know that about the fuse, but didn't touch them. I did remove the starter, went through it and cleaned it all up. Made sure all electrical connections were good - it's been working fine ever since.
After you've either replaced or gone thru the starter, a quick and dirty way to fix the wireing is to add a relay. Wire it so the original connection to the solenoid activates the new relay which is powered directly from the battery. An aftermarket horn or light relay, about an inch square works fine. If you are squeamish about such things, add an auto reset CB on the battery to relay line.