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Classic Truck Discussion Forum

1982 International model s

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James Williams

10-03-2014 13:02:19

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My turnsingles work in the rear,but not in the front,can someone tell me how the wires run,does the flasher control front on one terminal and rear on the other


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willie in mn

10-04-2014 01:50:28

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 Re: 1982 International model s in reply to James Williams, 10-03-2014 13:02:19  
Going to take a SWAG here, might be helpful, might not.
First a few questions-
fiberglass tilting hood?
do park/marker lights work?
how bright are headlights?
My first guess is ground wire failure. On some models IH used one ground wire for headlights & a seperate one for signals/markers.
IIRC, there will be a terninal strip, or a plug, where the harness passes from the hood to the frame, handy spot to test for power.When checking for power at the lights, connect the ground for your tester directly at the battery. Dim headlights would be a sure sign of bad ground, whether common to signals or seperate.
If indeed there is a ground failure, the most common spot is where the harness passes from the hood to the frame rail at hood hinge/ radiator/ frame junction. That harness has to twist a bit every time the hood is opened/ closed. HTH

p.s. Or even the simple failure, by coincidence, both bulbs failed at the same time. Have seen that happen. Spent some time working school bus shop back in mid 80's. About 50 busses pounding along gravel roads, bulb failure quite common.

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10-03-2014 21:48:04

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 Re: 1982 International model s in reply to James Williams, 10-03-2014 13:02:19  
Flasher just controls on/off of the circuit; it's the actual turn signal switch that controls the individual lights.

Rear turn signals are on the same side of the bulb/socket as the brake lights...which are NOT connected to the front turn signals. So current from the brake light switch also goes through the turn signal switch...but the position of the switch determines which one stays on when your brakes are on, and which one flashes. So there are separate "output" wires from the turn signal switch for left front, right front, left rear, and right rear.

Think about it for a second. It'll make sense to you. Check out the diagrams at the link below; they may help you understand how it all works.

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