Should both fans kick on when grounding diag.
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Senior Member
Joined: Jan 2009
Posts: 611
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From: DE
Car: 1990 Firebird Formula
Engine: LB9 - 5.0 TPI
Transmission: 700R4
Axle/Gears: 2.73, LSD
Should both fans kick on when grounding diag.
When I ground my terminals with the good ol' paper clip trick, I noticed that only one fan kicks on. Should they both be on?
Senior Member
Joined: Nov 2001
Posts: 915
Likes: 2
From: Erlanger, KY
Car: 1989 Iroc-z
Engine: 350 TPI
Transmission: Auto 700R4
Axle/Gears: 9 bolt - 2.77
Re: Should both fans kick on when grounding diag.
I think only the primary fan kicks on when jumping the diag. connector. The ecm controls the primary fan but not the secondary fan.
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Sep 10, 2015 09:07 PM