Near Intersection of I-35 & I-90 Southern Mn. | I have one myself but fortunately haven't had any problem with the relay.
I agree that doing some checking with a meter should be helpful.
I would make the assumption that with the relay removed or damaged that the rear differential goes into "lock" which is the problem. The relay would need to deliver 12V to the proper terminal to Unlock the rear differential to allow the rear wheels to turn at different speeds.
I would also make the assumption that one of the terminals is Ground IN. By testing each terminal for continuity to the frame you should be able to determine which of the four is Ground. Test all the combinations to the frame with the key switch ON/OFF and different positions of the drive switch. One of the terminals should stay at Ground with any combination. Mark it or make a drawing.
One of the remaining 3 terminals should be a key switched 12V source. With the key ON, find the wire that shows 12V to the ground terminal determined above. Turn the key ON/OFF to insure this is the key switched power source. Mark it or add to your drawing.
At this point there will be 2 terminals remaining. One will be the trigger in from the dash switch and the other will be the relay output to "unlock" the rear differential.
The one that is the trigger from the switch should show 12V if the key switch is ON and the 1 wheel drive position is ON (differential unlocked). Flipping the drive position switch between the 1 rear wheel and the 2 rear wheel position should cause that terminal to go ON/OFF. Mark it also.
The remaining terminal should be the one that actually unlocks the rear differential when it receives 12V. By putting a jumper or a jumper with a separate switch should allow you to unlock the rear differential (switch ON to deliver 12V) or switch to rear axle lock by switching the switch to the OFF position. You might even be able to hear the lock/unlock mechanism move when you flip your new switch.
Save your drawing for future reference.
The above procedure makes certain assumptions which may be incorrect but it is the approach I would take. |
Polaris Ranger differential relay
