F lamp on system check?
#1
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Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
F lamp on system check?
Hey does anyone know what F lamp stands for on the Pontiac system check? Car is an 1988 trans am gta 5.7 tpi
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Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
Re: F lamp on system check?
Here is what I found when using the good old google.
http://www.gtasourcepage.com/forum/s...ad.php?t=51078
http://www.gtasourcepage.com/forum/s...ad.php?t=51078
#7
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Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
I honestly have tried looking and posting on firebird nation and got nothing I have no access to pc
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Car: 1988 Trans-Am GTA
Engine: 5.7L TPI
Transmission: WC-T5
Axle/Gears: BW 3.27
Re: F lamp on system check?
The GTA digital dash light monitor works by checking resistance in the bulb circuits against other circuits of the same type (checks the left turn signal against the right for example. I am not certain of the exact process). If there is a difference in resistance it throws a "F Lamp" (front lamps) or R Lamp (rear lamps) at you to get you to replace the burned out bulb. Sounds cool right? never have a burned out turn signal again!
The problem is that due to the sensitivity of the system, once you replace that burned out bulb the system checks the resistance and thinks the other bulb on that circuit is now burned out because it has higher resistance. so you have to replace BOTH left and right bulbs of whatever type when you replace one. If this is break lights that means every time a bulb goes out you are replacing all SIX bulbs in the back, and probably both front turn signals as well. couple this with 25 year old ground connections and you have a recipe for an annoying beep every time you turn the headlights on. and then every time you hit the breaks.
So, you can fix this probably. replace all of your bulbs, check all of your grounds.
Since that sucks, many GTA owners, myself included, just unplug the "brain" of this system from under the dash allow the system to think everything is fine. the brain hangs down next to the fuzebox. I had to pull unreasonably hard with a pair of pliers to get the circuit board out of the box. see this link for a helpful photo.
http://www.gtasourcepage.com/forum/s...ad.php?t=47754
The problem is that due to the sensitivity of the system, once you replace that burned out bulb the system checks the resistance and thinks the other bulb on that circuit is now burned out because it has higher resistance. so you have to replace BOTH left and right bulbs of whatever type when you replace one. If this is break lights that means every time a bulb goes out you are replacing all SIX bulbs in the back, and probably both front turn signals as well. couple this with 25 year old ground connections and you have a recipe for an annoying beep every time you turn the headlights on. and then every time you hit the breaks.
So, you can fix this probably. replace all of your bulbs, check all of your grounds.
Since that sucks, many GTA owners, myself included, just unplug the "brain" of this system from under the dash allow the system to think everything is fine. the brain hangs down next to the fuzebox. I had to pull unreasonably hard with a pair of pliers to get the circuit board out of the box. see this link for a helpful photo.
http://www.gtasourcepage.com/forum/s...ad.php?t=47754
Last edited by Xophertony; 01-26-2014 at 11:11 AM.
#11
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Re: F lamp on system check?
The best way to remove that circuit board from inside the housing is to use a screwdriver,... insert it into the small "slot" at the top of the circuit board and use the plastic case to provide leverage so the board will pull free from it's plug.
I do NOT recomend any type of pliers as they could possibly damage to the circuit board.
I do NOT recomend any type of pliers as they could possibly damage to the circuit board.
#13
Supreme Member
Re: F lamp on system check?
Fog lamps maybe?
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