When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Need to wire the dash gauges to the standalone harness
I swapped a 5.3 into my firebird it’s 1989 I have all pictures of the engine harness and pictures of wires from what it looks like the dash they’ve been cut and some look messed up here’s pics I’ll try to post them in order from engine to wires that’s been there, I basically jus need help to identify which is which and where they connect to and what needs to be cut. I had the engine harness custom made and didn’t come with instructions and was never labeled
Get a wiring schematic that matches the 89 car, and the 5.3 harness/ engine/ vehicle you have.
Sort the wires from those schematics, and label accordingly.
The car dash gauges may not work with the 5.3 sensors.
I kept the gauges stock and I seen the computer for the inside (not for the engine) on the passenger side when I was putting the whole dash and stuff together
Get a wiring schematic that matches the 89 car, and the 5.3 harness/ engine/ vehicle you have.
Sort the wires from those schematics, and label accordingly.
The car dash gauges may not work with the 5.3 sensors.
When I did my 87 everything on the passenger side was old motor/ecm related and not needed. Driver side is where my harness plugged into car. Was your car originally a tpi or tbi? If I remember correctly only the tpi cars were basically plug and play once you sourced all the wires. Pocket was the guy who did my custom harness. Not sure if hes around anymore or not. Can check on thirdgen.org. I highly recommend going there as specific info on your swap. On a side note speedhut is doing 20% off right now so you can always get better gauges if you cant figure it out.
Do some searches through this forum. I know that I have at least once detailed gauge by gauge how to make them work. Basically add the oil pressure and water temp senders from the 89 to your 5.3 (I'd suggest oil pressure into a port on an aftermarket cover plate for the oil cooler lines, and the water temp into a adapter plug in the side of the block where the block heater goes, or drill/tap your passenger head location).
Fuel and volts should be no issue.
Tach you might need a converter, since it will look like a 4 cyl output from the LS computer. Speedo you just need to replicate how it was fed before hand.
I think the only wire you'd need from the LS is the tach wire.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Need to wire the dash gauges to the standalone harness 
