1991 trail boss 250 oil warning - Polaris ATV Forum
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post #1 of 6 (permalink) Old 12-26-2018, 05:45 AM Thread Starter
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1991 trail boss 250 oil warning

1991 trailboss 250 4x4 w918127
This bike had new top end rebuilt before i bought it bike starts and runs lots of smoke so i know it is getting oil but when bike is put into gear oil light on dash comes on?
2 stroke oil is more than half full and i dont see any sensor anywhere on bike.
Fan has been converted to switch on and off.

Any ideas on why oil warning comes on?
could a bad battery cause this, but battery starts quad no issues?

Last edited by copter14; 12-26-2018 at 06:10 AM.
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post #2 of 6 (permalink) Old 12-26-2018, 07:23 AM
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Unless I'm mistaken, your machine doesn't have an oil warning light. It has what Polaris calls a "Pilot light lens asm." From left to right its Hot(red), Neutral(green), High Beam(blue), Reverse(yellow), 4x4(red).
You said it comes on when you put it in gear. If its the red light on the right then that's the 4x4 indicator.
Here's a picture:
https://www.ebay.com/itm/New-OEM-Pol...S!-1:rk:1:pf:0
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post #3 of 6 (permalink) Old 12-26-2018, 09:06 AM Thread Starter
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unless someone has changed the dash part it defintely read oil but i will check again.oil message makes no sense anyways.

looks like this one is on quad so i agree it must be wrong.
https://www.ebay.com/itm/91-1991-POL...EYzk:rk:1:pf:0

Last edited by copter14; 12-26-2018 at 10:14 AM.
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post #4 of 6 (permalink) Old 12-26-2018, 11:51 AM
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There is more than one wiring diagram for the 91 Trail Boss 4x4 - some indicate 5 dash lights, but all indicate only 4 active - t none of the wiring diagrams I looked indicated an oil light.

By the wiring diagrams, you have dash lights for neutral (green), high (blue), reverse (amber) and 4x4 (red) there was a 5th light that was not wired on your machine and it was a red light for temp on the liquid cooled models - the parts diagram does not indicate a sending unit for the oil tank - the fan was an option, if the fan was not wired correctly, it might cause the hot light in the dash to come on.
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post #5 of 6 (permalink) Old 12-26-2018, 12:27 PM Thread Starter
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fan is wired to toggle switch on and off ill try and see if it turns that light off
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post #6 of 6 (permalink) Old 12-27-2018, 05:26 AM Thread Starter
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thats what i got took it apart got them all lighting up neutral works high beam works reverse works and far right works when in gear so i ordered the proper overlay for it that polman500 linked thank you both for the help. @latebird and @polman500
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