Originally Posted by fnsblum
What are you trying to do? Later! Frank
Im trying to determine where GM pulls its power from for the electric fan circuits.
1) Battery side of fusing
2) Alternator side of fusing
The big difference is the location of the main fuses, which are not included in the diagram attached above.
In the C3, there is a large fusible link between the Alternator BAT+ terminal and the starter heavy lug, which is a direct Battery connection with a heavy gauge wire.
I installed a fan which has a large additional draw and made my connection from the starter lug. Just tryin to see if I should be upgrading my Alternators charge wire from Alt to starter lug or pulling my dedicated fan circuit directly from the Alt connection.
There is logic to both set-ups and Im trying to see which way GM went.