manual fan switch & stock fan control
#1
Member
Thread Starter
Join Date: May 2001
Location: Middle TN USA
Posts: 153
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 FORMULA 350 / 1991 RX7
Engine: 5.7 L98 / LT1
Transmission: 700R4 / 6 speed manual
Axle/Gears: 3.42 posi / 4.11 posi
manual fan switch & stock fan control
Hi guys
i have a 89 gta 5.7 with dual fans. The fans kick on like there suppose to, but i would like to have the choice to control both manually. I am interested in installing a manual fan switch. However i would also like for my car to operate as gm intended. What is the easiest way to add a manual fan switch, for BOTH fans? I have been studying the chilton, & chevy thunder wiring diagrams. I would like to tap into the wire as close to the ecm as possible. Is C1, or E8 the wires I need to tap? looks like E8 will work only for the primary fan. any help would be great. btw I don't even see C1 on my chilton diagram.
i have a 89 gta 5.7 with dual fans. The fans kick on like there suppose to, but i would like to have the choice to control both manually. I am interested in installing a manual fan switch. However i would also like for my car to operate as gm intended. What is the easiest way to add a manual fan switch, for BOTH fans? I have been studying the chilton, & chevy thunder wiring diagrams. I would like to tap into the wire as close to the ecm as possible. Is C1, or E8 the wires I need to tap? looks like E8 will work only for the primary fan. any help would be great. btw I don't even see C1 on my chilton diagram.
#2
Supreme Member
iTrader: (15)
Join Date: Aug 2006
Location: Central NJ
Posts: 12,666
Likes: 0
Received 50 Likes
on
48 Posts
Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: manual fan switch & stock fan control
i believe the primary fan works of the fan switch, the other off the ac.
If you install a switch in parallel with the fan switch wire, you will be able to turn that fan on if you want to and it will still function as the factory intended as well. The switch will have to go to ground as the factory fan switch is a grounding switch.
I dont know about the secondary fan, i've never dealt with one.
If you install a switch in parallel with the fan switch wire, you will be able to turn that fan on if you want to and it will still function as the factory intended as well. The switch will have to go to ground as the factory fan switch is a grounding switch.
I dont know about the secondary fan, i've never dealt with one.
Thread
Thread Starter
Forum
Replies
Last Post
1992 Trans Am
History / Originality
27
05-10-2023 07:19 PM
The_Phoenix
Interior Parts for Sale
12
02-04-2016 07:10 AM
eightsixseven
Tech / General Engine
1
08-14-2015 03:09 PM