My light dont come on when im pushing the trigger

it sounds like faulty trigger take back and change it, Dennis

It sounds like the battery has a low charge or is defective, have it tested.

Not all nailers have the ability to bump-fire. It depends on the type of trigger and the firing valve that the trigger contacts. Remove gun from air supply and remove the nails (for safety). Take a close look at the trigger itself looking for a bump fire setting. It will have a rotary dial to select single or repeat fire. If no setting, look at how the safety foot contacts the trigger's inner trip lever (the trip lever inside the trigger is what actually contacts the firing valve pin). With trigger pressed in, push the safety foot in and notice if the safety contacts the inner trigger lever. On bump fire trigger, the safety foot mech. will push up on the inner lever each time that you press in safety (and you will see that the inner lever will depress the firing pin). On single fire trigger, with trigger pressed, when you push on safety foot, the mech. will not contact inner trigger lever because the lever is too short to allow safety to make contact with it. On single fire triggers, the inner lever can make contact with safety only when trigger is in the resting position. With trigger released, depress safety and notice that safety contacts inner trigger liver and will remain in contact untill you press the trigger at which time the inner lever will depress the firing pin then fall away from safety. If you are a tinker-er, you can make adjustment to inner lever so that it will make constant contact (the rotary dial on triggers that are made to give you a choice of bump or single actually make the inner lever longer or shorter ). If you make any adjustments, make various and numerous tests with-out nails to make sure that it will not fire accidently.

does everything else work? power light come on? fan? does the trigger click? seems like you've tested everything i would have tested. maybe the motor itself. its also possible that theres an open in the wiring to the trigger. i would take the trigger back apart and do a continuity test from the beginning of the wire to the connection in the trigger. check continuity on both trigger wires. the best way to to do that is using a volt meter on either the continuity setting or resistance setting zero resistance or infanite (depending on meter) will mean there is an opening and you will either have to fix it or replace it. if you dont have a volt meter you may also try arcing across the two trigger wires closer to the welder connection.see i had this problem before but it was a faulty trigger so im thinkin if it isnt the trigger (you said you tested it) then its the trigger wiring.

here you go...
1998 Ford Windstar Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Green/Violet
Car Radio Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Green
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Light Brown/White
Left Rear Speaker Negative Wire (-): Light Brown/Yellow
Right Rear Speaker Positive Wire (+): Light Brown/Green
Right Rear Speaker Negative Wire (-): Brown/Pink

check you starter is working, to activate starter touch a wire from the battery to terminal on starter ,starter should turn..

The batteries need to be charged. Even if the batteries are drain, the scooter will all ways be able to push it's own weight for a little bit. But, when you try to ride it the current draw goes up which the batteries are unable to supply because they dead. So, charge the batteries and you should be fine.

its a dirty injector

check the pin connectors make sure there not bent and that the line up right if that dont work try lightly bending them or cleaning them if that dont work sometimes theres a little peice of plastic that triggers the radio on look on face plate or head unit to see if maybe something broke off if it did try to find peice of plastic that size and super glue it on good luck..

i dont know about it making the light come on but you fill it in the low port, im thinking by the battery, the connecter will only fit correctly on the right one, the one you dont want to use will be to big to fit the connector on. (TIP: the lower port usualy has a grey cap on it)