LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

Dash harness 89 Firebird

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Old Apr 25, 2023 | 11:27 AM
  #1  
Ethan Lesz's Avatar
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Car: 1989 Firebird Formula
Engine: LS2
Transmission: T56
Axle/Gears: 8.8 Rear end from hawks
Dash harness 89 Firebird

I cannot find any pictures about how to interior/dash harness should lay in the vehicle. If anyone has any it would be a huge help.

Also would like some help wiring in my Holley terminator to work with the dash harness? Idk what to do first time messing with harnesses.

Thanks in advance

Also if someone is looking for a brand new GM OEM harness for a 93 camaro, I also have one for a 2002. I can send pictures if interested. message me -brand new never been use
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Old Apr 25, 2023 | 09:06 PM
  #2  
obeymybird's Avatar
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Car: 92 camaro RS
Engine: LSA
Transmission: Magnum F
Axle/Gears: TNT 8.8 wavetrac 3.31
Re: Dash harness 89 Firebird

No reason to try and combine the two harnesses.
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Old Apr 26, 2023 | 01:57 AM
  #3  
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Dash harness 89 Firebird

All the wiring for gauges go through the big connector next to the brake booster (named C100 connector).

You can find ideas in post #188, https://www.thirdgen.org/forums/ltx-...ml#post5825637

Basically the 1998 LS1 Camaro coolant temp sensor and oil pressure sensor are compatible with your gauges.

Tachometer and speedometer will be run by the engine ECM.

Voltage and fuel gauge will continue to work as normal, it has nothing to do with the engine harness.
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Old Apr 26, 2023 | 11:14 AM
  #4  
Ethan Lesz's Avatar
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Joined: Oct 2019
Posts: 15
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Car: 1989 Firebird Formula
Engine: LS2
Transmission: T56
Axle/Gears: 8.8 Rear end from hawks
Re: Dash harness 89 Firebird

Thank you
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Old Apr 26, 2023 | 11:14 AM
  #5  
Ethan Lesz's Avatar
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Joined: Oct 2019
Posts: 15
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Car: 1989 Firebird Formula
Engine: LS2
Transmission: T56
Axle/Gears: 8.8 Rear end from hawks
Re: Dash harness 89 Firebird

Originally Posted by obeymybird
No reason to try and combine the two harnesses.
Thank you
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