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How to Install Auto Meter In-Dash Tachometer Gauge - Electrical - Jeep Logo on your 87-18 Jeep Wrangler YJ, TJ, JK & JL
Shop Parts in this Guide
Calibration
IMPORTANT: This tachometer is factory calibrated to operate on 8 cylinder engines. For 4 or 6 cylinder engines, it is necessary to make the proper adjustments to adapt this tachometer to your cylinder range.
Locate the black plastic plug covering the switch access hole. Remove the plastic plug covering the access hole. Use a small screwdriver or an unwound paper clip to change the switch settings. Move each of the two switches to the proper cylinder selection according to the diagram illustrated on the right. Reinstall the plastic plug/cap into the access hole.
NOTE: This tachometer has an air core meter. With power off, It is normal for the pointer to leave zero. When power is applied, the pointer will move to the correct position.
Figure A.
4 CYL. - Switch One up, Switch Two down
6 CYL. - Switch One down, Switch Two up
8 CYL. - Both switches up
If you are unsure of your vehicle’s pulse(s) per revolution or specific calibration requirements, contact Mopar Technical Support at (888) 528-HEMI.
Lens Cleaning
To prevent scratching the lens when cleaning, use a mild, soapy solution to clean. Wipe lightly with a soft cloth.
Note: This tachometer operates on most early model ignitions, factory electronic and high performance electronic racing ignitions.
Mounting
1. Mount tachometer in a 33/8" dia. hole. Be careful not to cut the hole too large.
2. Cut a 3/8" dia. hole in the firewall for the tachometer wires. Place a rubber grommet in the hole and route
the wires through the grommet to the engine compartment.
3. Connect the tachometer wires as shown in the wiring sections.
4. Secure the tachometer to the dashboard using the provided bracket and hardware.
Wiring
WARNING
Warranty will be void if connected to coil when using an aftermarket ignition box such as, but not limited to products from the following manufacturers: MSD, Crane, Jacobs, Mallory, Holley, Etc.. Prior to installation of your tachometer, check with the ignition box manufacturer for recommended tachometer signal location.
CAUTION!!!
As a safety precaution, the 12V terminal of this product should be fused before connecting it to the 12V ignition switch. We recommend using a 1 Amp, fast-acting automotive fuse.
