Ignition Switch For Mack TrucksReplaces Mack 1MR4328M

Introduction

Keyed ignition and starter switch for Mack conventional cab trucks, replacing Mack 1MR4328M (superseded to Mack 20795157). PAI 804135 is an OEM-quality replacement that mounts in the steering column or dash panel and controls accessory, ignition, and start positions on Mack CH, CV, and CX series tractors.

Signs You Need a New Ignition Switch

• Key turns but engine fails to crank or starter does not engage
• Intermittent loss of power to dash gauges, radio, or accessories
• Key sticks, binds, or has to be jiggled to make contact
• Engine cuts out when the key is bumped or the column is moved
• Burned terminal or melted plastic at the back of the switch

Specifications

Cross References

This part replaces or is equivalent to the following part numbers:

• Mack: 1MR4328M, 20795157

Applications

This ignition switch fits the following Mack truck platforms:

• Mack CH series
• Mack CV series (Granite)
• Mack CX series (Vision)

For pinetree-style mating lock sets, the FLK-5721 (Mack 34RC3131M) lock set is referenced by Mack as a companion part.

Verify your truck’s VIN and the existing switch part number before ordering to confirm fitment.