1992 FLD 120 no start no power

bad/no ground.

bad cable/cables.

 

Buy a wire brush and test light, start at BATT. and clean all conn. wheh cleaning starter wires be sure that batt. are still discon. when cleaning those wires, the small wires on pos. big stud term. on starter sol. power dash.

 

Go buy a cheap voltage meter from Autozone ,disconnect all batteries from truck turn voltage meter to DC/20 put black on negative and red on positive voltage should register at least 12.5 on each battery if you find one lower than that that's your problem a good place to start,try and jump it off with cables if you find a bad battery,i dont kno if yours are like mines but look n see if the green light is still lit up if u have da regular batterys i would check fluid level .I would then move on to look at wires,alternator voltage,starter wires, relays and fuses.its a tedious process but it must be done ..hope this helps

 

In the battery box,follow the negative cable that goes to a welded on frame stud.you are going to have to find a new spot to ground that cable.usually the closest hole in the fraut and me to that stud will do.use a grade 8 bolt and clean the area of paint and rust first.good luck.

 

Check your ignition switch also.