Fan turn on

[Sevy14]

Hi all, at what temperature does the fan turn on? Or does that depend on what chip you have?
Thanks

 

[THensley]

all in the chip
so what chip do you have?

 

[Sevy14]

93 Octane Turbe Tweak

 

[THensley]

if Im correct it comes on at 160 defiantly running at 170

 

[GNVYUS 1]

In your case just run it until they go on and then you have a ballpark number for your chip. I'm assuming you have a Scanmaster or aftermarket gauge to read the temp.

I like 175 turn on then 168 off, F body rad with Ram Fans and 160 thermo.

 

[jlat]

hello people: Give TT a call. There is a forum there to answer all questions. have fun
IBBY

 

[Sevy14]

Mine not coming on. I replaced the thermostat and install a new gauge where the old idiot light sensor was. Maybe I disturbed something in the process. Watched the temp go up and could see when thermostat opened but didn’t have the fan come on. Temp went up to 190. Ill retest today.

 

[Sevy14]

Also noticed today. Only one wire going to my fan. Is that normal.?

 

[TexasT]

Mine not coming on. I replaced the thermostat and install a new gauge where the old idiot light sensor was. Maybe I disturbed something in the process. Watched the temp go up and could see when thermostat opened but didn’t have the fan come on. Temp went up to 190. Ill retest today.

If you run power directly to the fan does it come on?

 

[Sevy14]

That was going to be next move.

 

[XracerX]

Try turning on the A/C . This is one way to test that the fan itself works. Should come on in high speed.
If it does not come on with the A/C try bypassing the fan resistor. But try the following first.
You can also try swapping relay 23 and 24 on the drivers side inner fender if it does not come on at temp A/C off. That way you'll know if the low speed relay is bad.
23. Low Speed Fan Relay (ECM Controlled)
24. High Speed Fan Relay (Not ECM Controlled).

86-87 Turbo 3.8 Liter Engine Sensors

Common Part Numbers for 1986-87 Buick Turbo Regals and Grand Nationals

www.gnttype.org

 

[Sevy14]

Thanks will try when I get back. Nice illustration.

 

[Sevy14]

If you run power directly to the fan does it come on?

So ran power fan. It turned on. Strangely maybe not I only have one wir going to the fan. I powered the fan terminal with the wire and nothing. Power he terminal with no wire and fan turned on. Very noisy.

 

[Sevy14]

Found the issue. Someone in the past had a problem with the fan resistor. It is missing completely. So I’ve had no fan period. I’ve never driven it far enough or in hot enough weather to heat it up to the point it needed the fan. Time for a dual fan upgrade I’d say.

 

[GNVYUS 1]

Wow that's a strange deletion.

Ram fans are online now, though not by Ramchargers, I bought one a couple years ago in case they dissappear.

Amazon.com

Caspers Electronics offers a plug and play harness. Though I'd confirm with them these are a direct match.

Dual Fan Relay Harness 86-87 GN/Regal turbo

Dual Fan Relay HarnessUse this relay harness when installing a Dodge Intrepid dual fan assembly. This takes the excessive electrical load off of the factory wiring and places it upon two separate sealed relays.NO CONNECTORS TO ADD. This harness is Plug-And-Play design for the 86-87 Buick Grand Natio

www.casperselectronics.com

 

[TexasT]

noisy like a lot of air moving or a grinding like the bearings are hurt?

 

[Sevy14]

Grinding