Dorman 978-5412 multi-function switch for the 1988-1998 Peterbilt 378 and other vehicles operates the hazard lights and latching high beams from the console. It replaces a console switch that has failed from fatigue.
- Part of the Dorman HD Solutions line
- Operates the hazard lights and latching high beams
- Lever included, with white indicator markings
Quick facts
- Part: Dorman 978-5412 multi-function switch
- Fits: 1988-1998 Peterbilt 378 and other vehicles
- Condition: New
If the hazard lights or the high-beam latch stop responding, or the lever feels loose, a worn switch can be the reason. Before you replace the switch, rule out a blown fuse, a loose connector or damaged wiring, since the lights depend on those too.
Fits
This switch is a direct replacement for the 1988-1998 Peterbilt 378, the 1987-1998 Peterbilt 379 and the 1987-1994 Peterbilt 377, and each takes one. It is made to match the appearance and function of the original switch on these trucks.
Specifications
Fit and size
- Quantity per vehicle: 1
- Fit type: specific, not universal
Build and materials
- Connector colors: gray and black
- Condition: New
- Country of origin: United States
In the box
One multi-function switch with hardware.
Interchange: 577.75001
1603827 · TL10900 · VSM915Y104
This part cross-references / interchanges with the following part numbers:
577.75001, 1603827, TL10900, VSM915Y104
Frequently Asked Questions
Does the Dorman 978-5412 multi-function switch fit the 1987-1998 Peterbilt 379?
Yes. Dorman 978-5412 is listed for the 1987-1998 Peterbilt 379, and each of those trucks takes one switch.
Does the Dorman multi function switch come with a lever?
Yes. Dorman 978-5412 includes the lever and comes with hardware. The switch has white indicator markings.
Will this console switch run my wipers or cruise control?
No. This multi-function switch operates the hazard lights and latching high beams. Wiper, cruise control and fog light functions are not part of it.
How can I tell if this console switch is failing?
Hazard lights or a high-beam latch that stop responding, or a lever that feels loose, can mean the switch is worn. A shop can test the circuit and connector.
What color are the connectors on the Dorman 978-5412?
The connectors on Dorman 978-5412 are gray and black, and the indicator markings on the switch are white.
