[jspd50]

Hey everyone,

I'm doing a refurb on an 89 Fourtrax 300. I've replaced the headlights and tail lights with led models with no issue, until I got to replacing the oem neutral/oil/reverse indicators with led ones. The original lamps were lighting prior to replacement, but the new led ones won't illuminate. Is there something about the power draw difference that would cause this, and does anyone know if there's a solution?

 

[Goober]

The old ones are 3.4W right?

Unless you blew the fuse while changing them

 

[jspd50]

The old ones are 3.4W right?

Unless you blew the fuse while changing them

Yep. I'll check for sure on the fuse. Hopefully it winds up being that simple!

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[retro]

Do those replacement LEDs have a resistor built in to them? If they are naked LEDs the 12v system will have fried them in the 1st micro-second.

 

[jspd50]

Do those replacement LEDs have a resistor built in to them? If they are naked LEDs the 12v system will have fried them in the 1st micro-second.

They do. Just to be certain I didn't get faulty lights I touched the leads to the battery direct and they work. The electric start still works so it's nothing that deep into the system. The lights just won't light. I'm wondering if there's an in line fuse somewhere that I've missed.

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[retro]

Perhaps polarity is reversed..? Keep in mind that those indicator lights are powered (+) anytime the ignition switch is turned on... each light up when the circuit is completed by a (-) ground. In other words, the neutral light switch, reverse light switch, etc. supply grounds which turn on each individual lamp.

 

[Goober]

Perhaps the bulb contacts are too short

 

[jspd50]

Perhaps polarity is reversed..? Keep in mind that those indicator lights are powered (+) anytime the ignition switch is turned on... each light up when the circuit is completed by a (-) ground. In other words, the neutral light switch, reverse light switch, etc. supply grounds which turn on each individual lamp.

You called it! I reversed the wires and they lit right up. Thanks!

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[retro]

Thanks for letting us know how you fixed it! Have fun!