Author Topic: 2005 Cummins exhaust brake wiring  (Read 515 times)

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Offline kmehr

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2005 Cummins exhaust brake wiring
« on: July 5, 2020, 09:29:44 am »
I have the shifter mount MOPAR Jacobs exhaust brake on my truck. It has the shifter mounted switch, but the plastic has cracked and now it rattles so loud itís driving me nuts. I bought a complete MOPAR dash mount retrofit kit and then realized I didnít want to hack the brand new harness together (the kit includes the whole shebang like you are installing the exhaust brake for the first time), so then I bought a generic billet exhaust brake push button switch (billet automotive switches out of Australia- really nice quality).

Hereís my issue- the shifter mount switch has 4 wires going to it. The ďretrofitĒ switch only has three and the instructions for that donít distinguish what wire is what. I want to just splice in the new billet switch in without removing the whole harness. Here is the old shifter switch, the the new switch wiring, and the new switch. Any help appreciated:






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1984 W350 CC 6bt NV4500, dana 60/80 SOLD
2010 Audi Q5 3.2 V6- the Lady's
2005 Dodge 2500 QCSB NV5600 4x4
2015 Toyota Corolla- 100 mile a day commuter

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    Offline Mad Max

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    Re: 2005 Cummins exhaust brake wiring
    « Reply #1 on: November 26, 2020, 08:41:11 am »
    Kevin, has Jacobs been any help deciphering the wiring issue? 

    - Sam
    2002 Dakota Quad Cab 4x4 - 440/46rh/Atlas4/D60/14b/40s
    2007 Cummins Ram 3500 Megadually 4x4 "Big Mack" - 5.9/G56 6-speed
    2016 Durango Citadel AWD - 5.7 Hemi/8-spd auto
    1952 Willys M-38 "Poncho"

                    Ö.there's always a way...

                           ...Molon Labe...

    Offline kmehr

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    2005 Cummins exhaust brake wiring
    « Reply #2 on: November 26, 2020, 10:11:06 am »
    Jacobís wasnít, but the guy that made the switch helped some. I ended up adding the relay in that came with the Jacobís switch and it works great. Basically used the whole Jacobís kit minus their cheapo/dinky looking switch.

    Only draw back is the backlight on the switch when itís on is super bright, but itís still a big improvement over the ratteling old one.


    Sent from my iPhone using Tapatalk
    1984 W350 CC 6bt NV4500, dana 60/80 SOLD
    2010 Audi Q5 3.2 V6- the Lady's
    2005 Dodge 2500 QCSB NV5600 4x4
    2015 Toyota Corolla- 100 mile a day commuter

    Offline Mad Max

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    Re: 2005 Cummins exhaust brake wiring
    « Reply #3 on: November 26, 2020, 11:48:52 am »
    cool {cool}

    oh and Happy Thanksgiving! :)
    2002 Dakota Quad Cab 4x4 - 440/46rh/Atlas4/D60/14b/40s
    2007 Cummins Ram 3500 Megadually 4x4 "Big Mack" - 5.9/G56 6-speed
    2016 Durango Citadel AWD - 5.7 Hemi/8-spd auto
    1952 Willys M-38 "Poncho"

                    Ö.there's always a way...

                           ...Molon Labe...

    Offline kmehr

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    • Posts: 472
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    2005 Cummins exhaust brake wiring
    « Reply #4 on: November 26, 2020, 12:50:26 pm »
    cool {cool}

    oh and Happy Thanksgiving! :)
    Same to you and your whole clan!


    Sent from my iPhone using Tapatalk
    1984 W350 CC 6bt NV4500, dana 60/80 SOLD
    2010 Audi Q5 3.2 V6- the Lady's
    2005 Dodge 2500 QCSB NV5600 4x4
    2015 Toyota Corolla- 100 mile a day commuter

     

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