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i know it has a black wire going to it,so I figured it is grounded through it...I don't seem to have power going to it so I will pull it off and check to make sure it works
Pretty sure the leads take care of the grounding. Ages ago I relocated mine so I can reach it without disassembling the dash and I just used a tye-wrap to keep it solidly mounted and it all works great. If it needs solenoid bracket grounding then I did it just incidentally.....but really, I don't think it has to be screwed into a grounded location.
Originally Posted by 68 beginner
i know it has a black wire going to it,so I figured it is grounded through it...I don't seem to have power going to it so I will pull it off and check to make sure it works
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Alll your components that are under the dash need to have a ground to them. It should have a ground wire that goes from each unit to the wiring harness then the wiring harness ground to the left birdcage frame near the hood release. I had top hook all mine up since the PO didnt bother when he replaced the wiring harness when he fried it the first time...probably running hot lines to the wiper switch....he then ra a hot using speaker line from the alternator to the wiper switch...when I go the car I tried the wipers which let all the smoke out
Pretty sure the leads take care of the grounding. Ages ago I relocated mine so I can reach it without disassembling the dash and I just used a tye-wrap to keep it solidly mounted and it all works great. If it needs solenoid bracket grounding then I did it just incidentally.....but really, I don't think it has to be screwed into a grounded location.
I agree. The vacuum solenoid behind the tach does not need to be grounded. I have replaced one just like carriljc did and left the old one behind the tach. I zip tied the new one under the dash out of the way. Works fine.
Joe
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
one of the leads its self is a ground....so yes it has to be grounded through that lead, and you need to know where that lead goes...it might just go to hte tach housing, the override bracket, which needs a ground lead, or the dash frame....
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
THeres no ignorance just not fully informed yet. It gets power when the motor is energized so that there is vacuum from the black hose with the white stripe at the top of the door relay actuator, THe headlight switch performs this function for the headlights. WHen the wipers are turned off, the motor goes into the park function and continues to operate until the wipers park, then the power is cut off to the motor which kills power to the switch. The switch opens the internal valve that vents the vacuum which allows the actutator relay to shift to the down position. That changes the valving in the relay so that the vacuum that comes in on the big black hose with the yellow stripe to switch to the down side for the actuator. So there is always vacuum at that relay on 2 of the 3 bottom hoses but not always at the top
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
when the actuator relay starts to malfunction yuo may see the wiper door get stuck partially up or down. WHat happens is it will go too slow or it just doesnt vent the opposite side quuick enough and you can get vacuum on both sides of the actuator so the vacuum is pulling on both sides. If you pull one hose the do0r will usually finish the operation it is still connected for or at least it will when the hose is reconnected
THeres no ignorance just not fully informed yet. It gets power when the motor is energized so that there is vacuum from the black hose with the white stripe at the top of the door relay actuator, THe headlight switch performs this function for the headlights. WHen the wipers are turned off, the motor goes into the park function and continues to operate until the wipers park, then the power is cut off to the motor which kills power to the switch. The switch opens the internal valve that vents the vacuum which allows the actutator relay to shift to the down position. That changes the valving in the relay so that the vacuum that comes in on the big black hose with the yellow stripe to switch to the down side for the actuator. So there is always vacuum at that relay on 2 of the 3 bottom hoses but not always at the top
Thanks.
So if I understand things correctly, the Tach reference is just the part location, not a function reference.
RE: ground - note the ground lead spade off the right side of the solenoid, this would provide the definite ground which was spoken of earlier.
The solenoid doesn't need that ground-
It sees a ground from the blue wire only when the wipers are on (low or high speed)- and ignition +12V from the yellow wire- that's all that's needed to operate the solenoid.
The ground you reference is needed only for the lights in the tach.
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Re-read post #5.....
The harness needs to be grounded so you need to make sure everything is wired and grounded through the harness. If it is not and bubba just ran a ground to something metal. Then you need to ensure that something metal is grounded to the birdcage or the frame
08-09-2021, 10:02 AM
