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Thread: Economical turn signal flasher repair option

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    Default Economical turn signal flasher repair option

    This is a link to a posting I did about repairing dead turn signal flashers. It seems like we all have this problem at some point in time. Hope this helps:

    http://g503.com/forums/viewtopic.php?f=63&t=245916

    On my last outing the turn signal flasher died in the middle of the Veterans Day parade. I didn't have another one on the shelf so I went looking for a solution. What I found was a 12-24v flasher unit from Grote (44010) that will work with both regular lamps and LED lights up to 12 amps which should be plenty of current for our vehicles. The best price was on Amazon at $29 with 2 day delivery. This is what I did when I received it.

    Here's the flasher and the gutted Nartron flasher unit:

    Grote1.jpg

    Make sure not to cut the pins coming into the case from the 3 pin connector. You need to solder the wires back onto them.

    Remove the heatshrink from the wires on the flasher and cut the leads to about a 3" length and tin the ends of the wires:

    Grote2.jpg

    Solder the cables like this:

    Grote3.jpg

    a is the flasher output (green)
    b is power in (red)
    c is ground (black)

    Here's the finished flasher. It could be potted with RTV for waterproofing if necessary:

    Grote4.jpg


    Final cost was about $32 and an hours work. When it's remounted it will look exactly like the original because the Grote flasher is on the top side of the original one behind the dash.

    Kurt
    Last edited by Warthog; 12-30-2014 at 14:29.

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    2 Star General Jakelc15's Avatar
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    That's awesome. My flasher died a few months ago. Truck-lite makes the replacement but was unavailable from my local supplier. And was also very expensive if he could have gotten it.
    I was wondering if I could gut the factory flasher and save the connector.
    Thanks for posting.
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    That's exactly what I did here. The Nartron flashers are pretty easy to gut, I haven't tried any of the other models out there. I've ordered a couple of the connectors that mate with the wiring harness connector that can be put directly onto the flashers wires then all you would need would be to make a mounting bracket for the flasher. I'll do another post with that information when I finish it.

    Kurt

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    I went to the parts store and bought a 12v electronic flasher the one with three prongs input+ Lamp output+ and Negative Ground I connected everything by the book except for the ground on the flasher. I connected the ground of the flasher to a dash light bulb socket, a GM plugin type from the mid 80s. The bulb measured around 8 ohms resistance with my volt ohm meter. you connect one leg of the bulb to the flasher negative and the other leg to ground (chassis or cab) the bulb being in series absorbs the extra 12 volts that the flasher electronics does not want. my M35A2 has been blinking away with no problem.
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    Default Economical turn signal flasher repair option

    ImageUploadedByTapatalk1416774186.894343.jpg
    That other picture was a mistake
    Attached Images Attached Images
    Last edited by BBQROD; 11-23-2014 at 16:30.
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    4 Star General /Moderator doghead's Avatar
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    You can just buy a standard automotive blinker relay in 24V.

    2 or 3 terminal.

    Tridon eg-22 or eg-23
    M817, M818, M819, M35A2 w/w, M35A2, M109, M105, M116A2, M101A2, Pioneer tool trailer, MEP-002, MEP-017A, 5ton winch shear pins, Oral-B toothbrush

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    If you look up under the dashboard everything looks stock. The original connector is still attached to the flasher unit and no one can tell that what's installed is a better component.

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    Moderator, wonderful human being & practicing Deuce Doctor. Steel Soldiers Vendor clinto's Avatar
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    Quote Originally Posted by doghead View Post
    You can just buy a standard automotive blinker relay in 24V.

    2 or 3 terminal.

    Tridon eg-22 or eg-23
    OK, question.

    The factory relay on our trucks have 3 circuits: constant power in, flashing power out and ground.

    It appears the relay you spec'd (EG23) has 3 pins: a constant feed in, a trigger from presumably a turn signal switch and a flashing power output.

    See:

    Flasher Quick Reference

    B, X, + 49 = Battery (Power Input)
    C2 = Hazard Switch Ground
    E - 31 = Ground
    H = Hazard Switch
    I = Ignition
    L, 49a = Load
    P = Pilot Lamp
    S = Sense

    EG23 Bottom.jpg

    Or:

    z-EG23 cir.jpg



    So does anyone know of a part # for a civvy 24V flasher with three pins, for ground, power in and flashing power out?

    Gracias

    C
    Last edited by clinto; 01-03-2015 at 13:39.
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    That is how that one works, and the other one simply does not need a ground at all. (power in, flashing power out)

    I've been using them for some time now, and they work well.
    M817, M818, M819, M35A2 w/w, M35A2, M109, M105, M116A2, M101A2, Pioneer tool trailer, MEP-002, MEP-017A, 5ton winch shear pins, Oral-B toothbrush

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    In the schematic, the portion I boxed in red is representing your turn signal switch(left and right option).
    Attached Images Attached Images
    M817, M818, M819, M35A2 w/w, M35A2, M109, M105, M116A2, M101A2, Pioneer tool trailer, MEP-002, MEP-017A, 5ton winch shear pins, Oral-B toothbrush

    Ah Beefco Industries Northeast marketing associate

    Don't judge a fish by its ability to climb a tree

    https://www.youtube.com/watch?time_continue=12&v=T6BTcEwtmZo


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