1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

Headlight Issue on Ford

Discussion in 'Fisher Engineering Discussion' started by bdavis, Nov 7, 2009.

  1. bdavis

    bdavis Member
    Messages: 67

    I have an 03 F250....4 port isolation module,,,,installed today and only the pass side lowbeam light will work on the truck. If I switch the harnesses at the iso mod, port 3 and 4then only the driver's side lowbeam will work. Tried another iso mod...no luck. Also tried the jumpers on the #1 wire...no luck.....ANy help would be greatly appreciated.

  2. bdavis

    bdavis Member
    Messages: 67

    Got it....BAD ISO MODULE...now the jumper works...Thanks
  3. Raymond S.

    Raymond S. Senior Member
    Messages: 513

    make sure your connections at the iso module are good. My #3 plug has to be super tight for the driver side low beam to work. I actually have a wire tie around it to make sure it's tight.