For sure. Just helped a buddy figure out a problem with his wipers on his '65 camino. He was going nuts with wipers not working; got a new switch (crummy quality) then thought it was bad so went boneyard hunting and yanked two out of cars for extra measure. Calls me and says wipers won't shut off - they go on/off with the key. Said run a ground jumper from the switch case to a ground as none of the terminals to the switch are ground. Calls back and says they work great from switch now. When he had pulled out the switch he had lost a ground connect behind plastic bezel he couldn't see. Yep - never assume your grounds are good; I had ground issue when installing my tail lights after installing a new rear wire harness and refurbishing the lights with all new gaskets. Ran a jumper to known good ground and they then worked fine so added another ground wire.
