91 Z TBI, Where is the fan relay switch located?
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Joined: Nov 2006
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From: Wyoming
Car: 92 Chevrolet Camaro RS
Engine: 3.1L V6
Transmission: T-5
Axle/Gears: 3.42
Re: 91 Z TBI, Where is the fan relay switch located?
on the driver side there is 3 relays by on the top of the firewall. by the brake master cylinder
Supreme Member
Joined: Sep 1999
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From: Philly, PA
Re: 91 Z TBI, Where is the fan relay switch located?
Only 2 relays on a TBI car. Fan relay is the one closest to the driver's side fender near the power brake booster.
Other one is for the fuel pump.
Other one is for the fuel pump.
Joined: Jul 1999
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: 91 Z TBI, Where is the fan relay switch located?
91 Z TBI? That doesnt exist. 91 Z28's are TPI, and 91 RS's are V6 or TBI. Is that a typo?
The fan relays are as described above, while the fan switch is in the passenger side head between the #6 and #8 cylinders.
The fan relays are as described above, while the fan switch is in the passenger side head between the #6 and #8 cylinders.
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Re: 91 Z TBI, Where is the fan relay switch located?
Opps sorry, 91 Z TPI
you mean the brass sensor scews into the block btwen #6/#8?
What is the most likely part to fail if the fan isn't coming on?
the fan motor, relay? sensor? or something else?
THanks
Evan
you mean the brass sensor scews into the block btwen #6/#8?
What is the most likely part to fail if the fan isn't coming on?
the fan motor, relay? sensor? or something else?
THanks
Evan
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
It's the one that you test and determine is not functioning properly.
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Joined: Aug 2003
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Re: 91 Z TBI, Where is the fan relay switch located?
Having never gotten the hang for how an Ohm meter works, I just replace the part voted most likely to leave the island first and then the next and so on.
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From: Huntsville, AL
Car: 87 GTA, 88 GTA, 92 TA, 72 RS SS
Engine: 350, 350, 305, 396
Transmission: T56, 700r4, 700r4, T56
Axle/Gears: 3.42, 3.23, 3.23, 3.73
Re: 91 Z TBI, Where is the fan relay switch located?
Also check the connection to the fan switch, that connector is prone to getting brittle from the heat and breaking.
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Joined: Apr 2002
Posts: 1,353
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From: Austin
Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
Re: 91 Z TBI, Where is the fan relay switch located?
Learn to use the ohmmeter, it's really simple and will save you tons of money troubleshooting.
TPI cars have 2 radiator cooling fans.
The main radiator fan gets power from a relay as mentioned previously. That relay is controller by the ECM.
The secondary radiator fan gets power from a different relay. That relay is controlled by the thermal switch on the pass head as prev mentioned. The secondary fan relay can also be turned on by the air cond system if in use.
TPI cars have 2 radiator cooling fans.
The main radiator fan gets power from a relay as mentioned previously. That relay is controller by the ECM.
The secondary radiator fan gets power from a different relay. That relay is controlled by the thermal switch on the pass head as prev mentioned. The secondary fan relay can also be turned on by the air cond system if in use.
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