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Quick Specs


If you’ve tried to get your tach to function after an LS swap, you know that it isn’t always a simple procedure. Save time, frustration and don't make a single cut in your factory wiring with AutoMeter’s Plug and Play LS Tach Harness. This Plug and Play solution lets you quickly and easily install the AutoMeter 9117 Tach Adapter onto your LS-derived engine. OEM spec connectors and wiring assure a hassle free installation that takes minutes rather than hours. No splicing, cutting or risks of voiding your vehicle's warranty. It’s completely reversible and couldn’t be easier. Get the best possible results in the least amount of time with the solution guaranteed to work right, the first time.
Feature Points
  • Includes AutoMeter 9117 tach adapter
  • The complete plug and play solution
  • Does not alter factory wiring
  • Plugs into factory ignition coil connectors
  • Sealed connector plug in to AutoMeter 9117 Tach Adapter
California Residents: Prop 65 WARNING prop65 Cancer, Birth Defects and Reproductive Harm


Rated 5 out of 5 by from Tach signal adapter As with most swaps that I have been involved with, the tach signal from the computer is corrupt and the signal is lost, with the plug and play set up that I ordered is the greatest thing (NO CUTTING AND SPICING) just unplug the coil pack for each bank and plug in the adapter harness and mounted the adapter on the firewall and run the tach wire to the tach,little square box on upper pass side firewall look close to see
Date published: 2018-06-18
Rated 5 out of 5 by from Super simple Exactly how it is advertised. Comes with everything. Plug and play all I had to do is solder one wire for my power safe nitrous gauge so it could read rpm for the widow switch feature. Also customer support was 10/10 straight to the point and knew exactly what I needed to get my system working and if anything else I had would interfere with it.
Date published: 2019-11-29
Rated 1 out of 5 by from #9123 didn't work for me I purchase a #9123 harness and adaptor to power my #2300 tech on a LS3 swap. It didn't help and I weasted a lot of money on it. It looked very impressive. A very easy harness to install.
Date published: 2019-07-26
Rated 5 out of 5 by from LS Tach Signal Adapter I reviewed the data involving clean LS1 ecm tach signals. The resistor fixes are a carnival of tricks that will burn more of your nerves than pulling that $170 from your wallet.
Date published: 2020-04-12
Rated 5 out of 5 by from Works perfect for gen 4 LS conversions Great conversion help for hen 4 LS engine when using older style tachometers
Date published: 2020-09-07
Rated 5 out of 5 by from Easy fix It is very easy to install and worked with no changes needed on the gauge.
Date published: 2020-03-01
Rated 5 out of 5 by from Tach Easy to install. Nice simple connections. Works perfect
Date published: 2020-07-18
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