My Komatsu WB140 will not shift out of 4 wheel drive. Normally, I keep it in 2 wheel drive unless 4wd is needed. This happened before. The 4 wheel drive light indicator would come on when I depressed the brakes. I pumped the brakes a few times and the light would go out, and the tractor would be in 2 wheel drive. Now, I depress the brakes and the indicator comes on and the tractor is in 4 wheel drive. I have tried toggling the switch with no changes. I assume it is a stuck relay. Why is it only indicating 4 wheel drive when I depress the brakes? Any help would be appreciated. Thanks
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