JEGS 555-41344 Retro Muscle Car 6-Gauge Set Instruction Manual
- June 5, 2024
- JEGS
Table of Contents
Tachometer Installation Instructions
555-41344 & 555-41377
Retro-Style Tachometer 33/8 in. & 5 in.
Parts List
| # | DESCRIPTION | QTY |
|---|---|---|
| 1 | Gauge | 1 |
| 2 | Mounting Bracket | 1 |
| 3 | Securing Nut (Knurled) | 2 |
| 4 | Washer (External Star) | 2 |
| 5 | Wire Connectors (Female) | 6 |
Installation
BEFORE YOU START
- Read instructions completely before starting the installation.
- Always wear safety glasses.
- Fits vehicles with a 12-Volt Negative (–) ground electrical system.
- Install gauge only when the engine is cool and ignition is off.
- Make sure all necessary tools, materials, and parts are on hand.
- Disconnect negative (-) battery cable before installing gauge.
Wiring
Use 20 AWG stranded or heavier wire for installation. Route wires away from
any moving parts and hot engine components. Secure wires firmly along their
route. Note: As a safety precaution, the ACC and 12V+ connections should be
fused. We recommend using a 1 Amp, 3 AG fast-acting type cartridge fuse.
Tachometer Signal Hookup
This performance tachometer has two signal input options (SIG 1 & SIG 2). See the wiring diagram on the next page. Signal Hookup. Choose the option best suited for your vehicle’s ignition system. Only connect 1 signal input. If you are unsure which signal input to use, connect your signal source to SIG 1.
NEVER CONNECT SIGNAL WIRE TO THE COIL WHEN USING AN MSD OR SIMILAR
HIGH OUTPUT CAPACITIVE DISCHARGE STYLE IGNITION SYSTEM.
Incorrect installation will damage the tachometer and the warranty will be
voided.
Calibration
Calibration of the tachometer is done via dipswitches in the back of the gauge. There are 3 dip switches, each of which can be set to OFF (down) or ON (up). See Fig 1 for settings.
Dimmable LED Lighting
This gauge features through-dial, high-definition LED lighting that will not dim when used with standard dash dimmers.
Lens Cleaning
The gauge lens is made of acrylic plastic. Do not use any chemicals or abrasives when cleaning. To prevent scratching, caution must be used. To clean, wipe lightly with a damp soft cloth.
Lens Protective Film
The gauge comes with a soft protective plastic film on the lens. Remove the protective film when gauge installation is complete.
Wiring Diagram
DIPSWITCHES FOR CALIBRATION SETTINGS
| CYLINDERS | 1 | 2 | 3 |
|---|---|---|---|
| 0.5 PPR (1 Cylinder) | OFF | OFF | OFF |
| 1 PPR (2 Cylinder) | OFF | OFF | ON |
| 2 PPR (4 Cylinder) | OFF | ON | OFF |
| 3 PPR (6 Cylinder) | OFF | ON | ON |
| 4 PPR (8 Cylinder) | ON | OFF | OFF |
| 5 PPR (10 Cylinder) | ON | OFF | ON |
| 6 PPR (12 Cylinder) | ON | ON | OFF |
Signal Hookup
Determine which signal input to use (SIG1 or SIG2). Only connect ONE signal input. If you are unsure which signal input to use connect your signal source to SIG1.
Clean Tach Signal
Connect the signal wire from the original source to SIG1 if you are using a
tach signal from any of the following.
- Ignition with the tach output terminal
- ECU
- Tach adapter
- Other “clean” tach signal source
Ignition Coil (–)
If you are using a signal from an ignition coil (–), connect the signal wire
from the coil Negative (–) to SIG2.
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