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Applying brakes or lights shuts down the engine

Discussion in 'CJ' started by bagger99, Jul 14, 2018.

  1. Jul 14, 2018 at 8:05 AM
    #1
    bagger99

    bagger99 [OP] New Member

    Joined:
    Jul 14, 2018
    Member:
    #2437
    Messages:
    1
    Gender:
    Male
    Vehicle:
    Jeep CJ7
    I'm in process of restoring a 77 CJ7.
    Going well and runs well, until suddenly electrical problems arose. Engine starts and runs great, yet everytime I apply brakes, turn signals, headlights, heater &/or wipers it shuts down the engine. Does or would anyone have any suggestions? Thanks
     
  2. Jul 15, 2018 at 10:26 AM
    #2
    Squatchy

    Squatchy Well-Known Member

    Joined:
    Jul 11, 2018
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    63
    Gender:
    Male
    First Name:
    Mark
    Vehicle:
    2017 hyper green jku
    The first place I would look is the fuse box in the firewall on the driver side. I had a 78 cj5 with a similar problem and it ended up being that fuse box had started to melt and the wires were all shorting out. If that checks out ok then check your alternator and make sure it’s charging.
     
    aggrex likes this.
  3. Jul 15, 2018 at 11:02 AM
    #3
    aggrex

    aggrex Well-Known Member

    Joined:
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    DE
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    Backcountry '16
    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    Start with the basics as mentioned by @Squatchy as well as good clean ground wires. Something is possibly shorting and putting a load on the electrical system. Might be a good time to have the battery and alternator checked.....car parts places such as Advance or Auto zone usually offer free analysis.
     
  4. Jul 16, 2018 at 7:34 AM
    #4
    Billyo15

    Billyo15 Member

    Joined:
    Jul 3, 2018
    Member:
    #2409
    Messages:
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    Vehicle:
    84 CJ7 4.2l
    Mine was doing the same thing, Lights, Wipers, Heater, Radio, any electronics........changed the alternator.... boom.. everything works great, no problems
     
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