Dash harness 89 Firebird

Reply Subscribe

Thread Tools

Search this Thread

04-25-2023, 11:27 AM

Ethan Lesz

Junior Member

Thread Starter

Join Date: Oct 2019

Posts: 12

Likes: 0

Received 0 Likes on 0 Posts

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

Reply Like

04-25-2023, 09:06 PM

obeymybird

Supreme Member

iTrader: (4)

Join Date: Sep 2005

Location: PA

Posts: 1,091

Likes: 19

Received 50 Likes on 44 Posts

Car: 92 camaro RS

Engine: LSA

Transmission: Magnum F

Axle/Gears: TNT 8.8 wavetrac 3.73

Re: Dash harness 89 Firebird

No reason to try and combine the two harnesses.

Reply Like

04-26-2023, 01:57 AM

QwkTrip

COTM Editor

iTrader: (22)

Join Date: Mar 2001

Posts: 9,934

Likes: 0

Received 1,861 Likes on 1,275 Posts

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.