2G Turn signal not working over 2500rpm

[my1st2genGSX]

So as the title states my turn signals don't work over 2500rpms....I have read the 4 articles that kinda brought up the same problem, but I believe everything is ground. I didn't have any of theses issues before my crank position sensor went out. What could be going on. Haven't had a chance to pull a diagram yet.

 

[92AWDHX40]

Pull the diagram out sound like a short somewhere. Check your connections also.

 

[1990TSIAWDTALON]

The EASIEST thing to check is a good ground. Rule out a bad ground before you go chasing electrical gremlins. Sounds stupid but real easy to check with a pair of jumper cables, temporaraly. Clamp the black on the negitive side of the battery and clamp the other black inside the cab somewhere for a good ground. No change after several different points?? Move on to circuits, which are much more time consuming. Good luck.