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

Fisher ISO Module HELP!

Discussion in 'Fisher Engineering Discussion' started by Nascar24, Jan 21, 2009.

  1. Nascar24

    Nascar24 Senior Member
    Messages: 645


    I have a 4 port Fisher Iso Module and was wondering if it would work on a 89 Chevy truck, It is going to have to be hooked up to a a 3 plug MM I with an Insta Act pump.

    The Module has a few sets of numbers on it:

    SERVICE PN F 26400
    W 26385

    PN 26134 REV 1 B/D 99361


  2. MOXIE

    MOXIE Member
    Messages: 38

    ISO Module

    You may need harnesses. The 3rd and 4th port are truck specific. What kind and yr of truck did it come off?? Fisher may not have the correct harnesses because in 1989 they did not have an ISO module.
  3. Nascar24

    Nascar24 Senior Member
    Messages: 645


    Not sure , I'm under the impression it was on a Ford Or a Dodge , the headlamp harnesses look like the ones I have seen of Fords and Dodge's. I read somewhere that you could use any 4 port module if the truck doesn't have DRL, but I want to be sure one way or the other.
  4. Crash935

    Crash935 2000 Club Member
    Messages: 2,377

    Iso mod will work, harness' will work as long as donor truck had 2B/2D or HB2 bulbs. Short harness # 26356, long harness # 26353.
  5. Nascar24

    Nascar24 Senior Member
    Messages: 645

    Thanks for the help!