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11-13-2007, 05:32 PM
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#1 (permalink) |
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Senior Member
Join Date: Dec 2005
Posts: 162
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72 engine harness
I'm in the middle of installing a new engine harness for my 72 that has been modified for HEI. The harness has two wires that go to the starter solenoid. One purple and one yellow. The purple wire connects to the "S" terminal on the solenoid. Does the yellow wire need to be connected to the "R" terminal? The old harness had been butchered to accommodate the HEI, but the only wire connected to the solenoid was the purple one. The car started and ran with it this way. The schematic shows a yellow wire between the solenoid and the coil terminal on a points ignition. Since the new harness has the yellow wire going down to the starter, should it not be connected? Also, what do the "S" and "R" indicate on the solenoid?
Thanks, Chumley  |
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11-14-2007, 12:38 AM
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#2 (permalink) | ||
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Junior Member
Join Date: Oct 2004
Location: Southern CA
Posts: 1,063
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Quote:
"R" = 12V power from the starter solenoid, to the points, via a resistor wire. The wire is not used with the HEI, and can be discarded. Norm
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11-15-2007, 06:54 PM
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#3 (permalink) | |
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Super Moderator
Join Date: Apr 2004
Location: San Antonio, Texas
Posts: 807
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Quote:
The original resistor wire needs to be replaced or capped and a new full 12v (switched) wire run to power the HEI. But, yes, the 'R' wire is no longer needed. C.J.
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Home of the 1971 Cutlass Supreme convertible Super Karate Monkey Death Car.  
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11-15-2007, 07:13 PM
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#4 (permalink) | ||
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Junior Member
Join Date: Oct 2004
Location: Southern CA
Posts: 1,063
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Quote:
Norm
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11-15-2007, 08:02 PM
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#5 (permalink) |
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Senior Member
Join Date: Dec 2005
Posts: 162
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Thanks guys, I learned all about the resistor wire stuff when I put HEI in my truck. There is no resistor wire with the new harness since it has been modified for HEI and otherwise is exactly like the stock harness. My question is, what is this yellow wire on the new harness, and do I need to connect it? It seems like it is supposed to be, or the harness manufacturer would not have put it there. Thanks, Chumley
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11-15-2007, 08:16 PM
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#6 (permalink) | ||
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Junior Member
Join Date: Oct 2004
Location: Southern CA
Posts: 1,063
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Quote:
Norm
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