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Thread: Wiring help. Brake and turn lights.

  1. #1
    Senior Member Motor_Freak's Avatar
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    Wiring help. Brake and turn lights.

    Just finished my wiring and ran in to this problem:
    When I press brake, both turn signals lid along with brake lights..

    I will really appreciate any help! Thank you!

  2. #2
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    When you turn on either side directional do both sides flash?
    '33 Hotrod, #1047 Gen 1, delivered on 2/27/18, go cart on 9/24/18.
    LS3 w/Gearstar Level 3 4L65e Tranny, Yank converter, Lokar shifter, Electric PS, Vintage AC/Heat/Def, 8.8" 3.55
    TorqThrust II Wheels w/Toyo Proxy T1 Sport Tires, F 235/45ZR17 R 295/35ZR18
    Garage Built, Driveway Painted.

  3. #3
    Senior Member Motor_Freak's Avatar
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    No, this option works properly. Only when I brake both front turn signals lid along with brake light..

  4. #4

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    Bad ground connection?
    Sigurd
    Type 65 Gen 3, 347 Fi, Tremec, IRS, Wilwood, AC, PS

  5. #5
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    Just for clarification, let us know what wiring harness that you are using.

    Olli

  6. #6
    Senior Member Big Blocker's Avatar
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    How many dash indicators, one or two? Did you install diodes in-line to the dash indicator if only one is used?
    Are the bulbs installed correctly - in the past, the bulb sockets supplied were loose enough to allow bulbs to be inserted 180° out of wack (<-- highly scientific word used by car guys a lot) causing a crossed-circuit at the socket. That could allow for your issue . . .

    Doc
    FFR3712K (MKII) in Lost Wages Nevada.
    5.0 w/tubular GT-40 EFI, E303 cam, Custom 4 into 4 headers, T5, 3-Link 3.73 rear. Full F5 tubular suspension. Drop Butt mod, Dash forward mod, custom foot box air vents, custom turn signal system. 13" PBR brakes, Fiero E-Brake mod, Flaming River 18:1 rack w/ F5 bump steer kit on Breeze bushings. 17" Chrome Cobra "R's" w/ 275 fronts and 315 rears. MKIV seats. FORD Royal Blue w/ Arctic White stripes.

  7. #7
    Senior Member Motor_Freak's Avatar
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    I am using wiring harness form FFR.
    No indicators or diodes installed.
    BTW, Hazard light works well.

  8. #8
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    Quote Originally Posted by Motor_Freak View Post
    I am using wiring harness form FFR.
    No indicators or diodes installed.
    BTW, Hazard light works well.
    Since you are using hot rod steering column you have to snip the connection in the harness where directional lights come together in the harness for the switch when the hot rod column is not used. It’s in the ffr manual.

    I think it’s in the wiring manual as well- not 100% sure.

    The cobra uses a different circuit for brake lights where the hot rod uses the same circuit and interupts the brake light while turning if the brakes are applied.
    Last edited by FFinisher; 04-11-2019 at 12:36 AM.
    FFinisher/AKA RE63

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    I think it is the purple wire.

  10. #10
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    Nope, the purple wire is the brake wire and is not used in the hot rod with the hot rod column.
    FFinisher/AKA RE63

  11. #11
    Senior Member FF33rod's Avatar
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    There are 4 wires to change according to the manual. One for horn, one for hazards (pink), and 2 related to turn signals because we are not using a dash mounted switch. Sounds like its the last one that you might have missed. You need to seperate yellow and white front turn signal wires from the green and blue rear turn signal wires where it goes to dash switches on the roadster. Its in the main HR manual just before the fan wiring section
    Gen 1 '33 Hot Rod #1104
    347 with Holley Sniper & Hyperspark, TKO600, IRS, 245/40R18 & 315/30R18, DRL, Digital Guard Dog keyless Ignition

  12. #12
    Senior Member Motor_Freak's Avatar
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    Quote Originally Posted by FF33rod View Post
    There are 4 wires to change according to the manual. One for horn, one for hazards (pink), and 2 related to turn signals because we are not using a dash mounted switch. Sounds like its the last one that you might have missed. You need to seperate yellow and white front turn signal wires from the green and blue rear turn signal wires where it goes to dash switches on the roadster. Its in the main HR manual just before the fan wiring section
    Thank you FF33rod! Thank you guys! For some reason I missed this part from the manual. All good now!

  13. #13
    Senior Member Motor_Freak's Avatar
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    Now when engine is running turn signals and hazard lights works intermittently. Engine off all OK. Will try post video later today..

  14. #14
    Senior Member Motor_Freak's Avatar
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    When engine off all works fine. Engine running turn signals works intermittently. Hazard lights OK.
    PLEASE HELP!

  15. #15
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    Your using the other flashers that have the ground wire, right?
    '33 Hotrod, #1047 Gen 1, delivered on 2/27/18, go cart on 9/24/18.
    LS3 w/Gearstar Level 3 4L65e Tranny, Yank converter, Lokar shifter, Electric PS, Vintage AC/Heat/Def, 8.8" 3.55
    TorqThrust II Wheels w/Toyo Proxy T1 Sport Tires, F 235/45ZR17 R 295/35ZR18
    Garage Built, Driveway Painted.

  16. #16
    Senior Member FF33rod's Avatar
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    Actually are those LED front lights or not. If not, maybe the original flashers are okay to use? In any case, I'm suspecting a bad ground on the turn signal relay...
    Gen 1 '33 Hot Rod #1104
    347 with Holley Sniper & Hyperspark, TKO600, IRS, 245/40R18 & 315/30R18, DRL, Digital Guard Dog keyless Ignition

  17. #17
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    The front and rear turn signals are LED's.
    With LED's you should be using the 2 flasher modules that plug into the RF fuse block.
    Last edited by JimLev; 05-25-2019 at 07:33 AM.
    '33 Hotrod, #1047 Gen 1, delivered on 2/27/18, go cart on 9/24/18.
    LS3 w/Gearstar Level 3 4L65e Tranny, Yank converter, Lokar shifter, Electric PS, Vintage AC/Heat/Def, 8.8" 3.55
    TorqThrust II Wheels w/Toyo Proxy T1 Sport Tires, F 235/45ZR17 R 295/35ZR18
    Garage Built, Driveway Painted.

  18. #18
    Senior Member Motor_Freak's Avatar
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    50W 6Ohm LED Load Resistors for LED Signal lights will Fix Hyper Flash Problem!

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