MrMarty51
Full Access Member
- Joined
- Oct 25, 2012
- Posts
- 8,138
- Reaction score
- 10,943
- Location
- Eastern Montana
- First Name
- Martin
- Truck Year
- 1978
- Truck Model
- K20
- Engine Size
- 400
If the stock wiring is left alone, they all come on![]()


Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
If the stock wiring is left alone, they all come on![]()
BUT,just not the order We like um to be innnn.
![]()
Lol, I was being serious
The stock 4-headlight trucks (not sure about the '89-'91 though) have all four lights on when the brights are switched on. Apparently when you buy and instal an "upgraded" harness, you lose all four lights being on at the same time.
Lol, I was being serious
The stock 4-headlight trucks (not sure about the '89-'91 though) have all four lights on when the brights are switched on. Apparently when you buy and instal an "upgraded" harness, you lose all four lights being on at the same time.