Originally Posted by Bill Hanlon
The T2 (sense) wire, the smaller of these "two red wires that come together", should ideally be connected back in the electrical system under the dash somewhere (that is how GM designed it) instead of to the output lug on the alternator.

THANK you! I just did that (to the ammeter), and it made a huge difference! Now it goes back above 14v when the fans are turned on.

Thank you to everyone for your help.

Last edited by Alex Arrow; 06/30/2023 5:14 PM.
Alexander's Automotive Assortment
  • 1953 GMC 9700 3-ton**
  • 1978 Plymouth Arrow
  • 1980 Jeep J10 Cargo Truck
  • 1985 Red Wagon Trailer (for cars)
  • 1986 Toyota Tercel Wagon 4wd

**(9700 in Canada or 450 in USA.)