Re: Help with TR upgrade
Get the diode at Radio Shack. The package should cost about $2.
The wire you want to install the diode in is the #1 or A wire (usually smaller of the two) on the alternator Two wire plug.
'79 had the Delco 10-SI alternator, so there will be four connection points to your alternator.
2 on a plug that goes in the side of the case, marked on the back of the case A & B or 1 & 2. The first one should be connected to a white wire on the #1 terminal, and a slightly heavier red wire should be hooked to the #2 terminal, both in a plug type connector..
1 on the back, marked 'BATT', easy to identify because it's the one that the heavy red wire hooks to.
1 on the back, unmarked heavy bolt type terminal, that a ground wire should be hooked up to, but probably isn't.
Cut the wire close to the alternator and install the diode. If the engine still runs on, reverse the diode.
When the system works the way you want it, waterproof the connections as well as you can.
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