Burning smell when wipers are on.

[chevman51]

Hey guys, On my 94 CH613 Mack I smell something burning when my wipers are on for a continuous time. Its a faint smell and the wipers do seem to slow down. One time they stopped all together in the middle of a rain storm and I had to turn it off and use intermittently. Is my switch bad or wiper motor bad? or other ideas? I don't want to just start throwing parts at it and not fix the problem. Thanks!

[dogg rescue]

Most likely your spindles that the wiper arms mount on are rusty. It will act like the motor is failing.

[chevman51]

Really? Can that be pulled apart and cleaned?

 

[dogg rescue]

I've pulled them apart and cleaned them, and put some grease on them. Of course you can buy them new but they aren't cheap.

[chevman51]

Thanks! Have you ever had a switch go bad?

 

[41chevy]

3 hours ago, chevman51 said:

Thanks! Have you ever had a switch go bad?

 

If the motor or pivots bind it COULD back feed to the switch and over load the ground circuit. You can tell down at the switch connector on the column if it overheated there will be melting of the plastic.   Paul.