FiveSeventyZee Posted November 15, 2012 Report Share Posted November 15, 2012 can anyone explain to me how the wiper switch and motor are supposed to work? I'm trying to figure out why my wipers went out and I can't figure it out. I took the switch apart and looked at it, looks like 3 of the wires go into the contacts for the push/pull motion and there are 2 wires that look like power and ground (maybe for the washers?) that contact when you twist the switch. As for the motor I figure i can supply power to it directly to see if thats causing the problem but idk which contacts to supply power to and which to ground. I guess what I'm after is an explanation of the wiper motor wiring, I know where the wires go, I need to know which are hot, which are ground and when the hot wires carry charges thanks to anyone who can help, the 510 is my only car right now and there is rain in the forecast on the 16th.... :/ gotta figure this out NOW haha Quote Link to comment
ggzilla Posted November 15, 2012 Report Share Posted November 15, 2012 The wiper is powered HOT anytime the key is turned to IGN. The switch connects the wiper to ground. So turn key to IGN, go to the wiper connector, disconnect it from the motor and check for 12V on one of the terminals. If not probably a blown fuse. Quote Link to comment
DanielC Posted November 15, 2012 Report Share Posted November 15, 2012 One way that wipers are wired is this. The wiper motor has power applied, and is turned off by switching off the ground connection. But the motor can supply it's own ground, except when the motor gets to the place the wipers are parked. Turning on the wipers with the switch, grounds the wiper motor, and the wipers start. The wiper switch also can change motor connections to a higher speed in the motor. Quote Link to comment
ggzilla Posted November 15, 2012 Report Share Posted November 15, 2012 That's how Datsun wiper motors work. Quote Link to comment
ggzilla Posted November 15, 2012 Report Share Posted November 15, 2012 I used to rebuild and test wiper motors professionally. I wrote up with photos how it works at http://datsun1200.com/modules/mediawiki/index.php?title=Wiper_Wiring It will explain in details how they work. The wire colors are same for a 510, except for LY vs Y wire (most likely exactly the same). Quote Link to comment
datzenmike Posted November 15, 2012 Report Share Posted November 15, 2012 Pull the plug off the wiper motor. You should have 12 volts on the Blue/Red stripe wire with key on. Quote Link to comment
FiveSeventyZee Posted November 15, 2012 Author Report Share Posted November 15, 2012 anyone got any info on the switch wiring? I have a "universal" wiper switch thats got the right number of terminals, I'm just trying to figure out which wires go where. My stock switch is broken and the wires are all black...the wiring on this car has been a nightmare...I'm really not surprised I'm having trouble with it again... should it have 12v with the switch unplugged at the connector? it seems like it likely wouldnt...the wires look like they all go strait from the switch to the motor EditL I read that link you posted ggzilla. I have concluded that I wired the switch wrong for sure, and I may need to replace the fuse. I'm gonna look into the wiring on the switch Quote Link to comment
ggzilla Posted November 15, 2012 Report Share Posted November 15, 2012 The switch does not handle 12V. It only grounds certain wires that go to the wiper motor and ground to the washer motor. here is the switch wiring Quote Link to comment
FiveSeventyZee Posted November 15, 2012 Author Report Share Posted November 15, 2012 yeah just saw that. I'm gonna take another look at my switch and try to follow that diagram. thanks Quote Link to comment
FiveSeventyZee Posted November 15, 2012 Author Report Share Posted November 15, 2012 what is the job of the Y/LY wire? (its LY on my car fyi) Quote Link to comment
ggzilla Posted November 15, 2012 Report Share Posted November 15, 2012 Y or LY is the parking circuit. If you push the knob to OFF it connects the two wires, and it will keep running until it returns home. By the way, the Wiper Switch is all same color wires. That's no problem because they go to the connector a certain way. Quote Link to comment
FiveSeventyZee Posted November 15, 2012 Author Report Share Posted November 15, 2012 any idea why this switch has 2 of the leads attached to each other? I'm starting to think this universal switch wont work for the 510, might be time to drop some money on one. Quote Link to comment
ggzilla Posted November 15, 2012 Report Share Posted November 15, 2012 Just get a 510 switch. $5 to $20 buck should do it. Quote Link to comment
FiveSeventyZee Posted November 15, 2012 Author Report Share Posted November 15, 2012 I would but so far all I can find is on ebay and over $40 Quote Link to comment
Laecaon Posted November 15, 2012 Report Share Posted November 15, 2012 Put up a wanted ad. I know I have seen lots of spare wiper switches in garages. Quote Link to comment
banzai510(hainz) Posted November 15, 2012 Report Share Posted November 15, 2012 i BET THOSE OLD DATSUN SWITCHES CAN BE FIXED IF OPENED UP. Quote Link to comment
FiveSeventyZee Posted November 16, 2012 Author Report Share Posted November 16, 2012 I tried to fix it. Got it opened up fine, cleaned up the contacts, got em nice and shiny and put it back together. I was pretty confident that this was going to be the solution to my problem because when I opened it, the little copper contact plate was loose and getting in the way of the pulling motion. plugged it back in and tried it with no success. so I gave up on MY stock switch and tried the next step, what I had on hand, that didnt work out, the switch I have is weird and doesnt have the same function as the datsun unit. So now I'm on to step three, locating a new factory 510 switch, pl521sss said he has one so I emailed him, hoping to get that pretty quick. Thats the deal with the switch, the motor on the other hand is having its own problems. the bigger issue is a high resistance fault in the LR wire somewhere because its getting no voltage. Also decided to poke around a bit while I had the dmm out and found that the BW wire on the fusebox also has a high resistance fault somewhere because its got 3-4.5v never 12v. I already knew the wiring on this car isn't the best so I'm just replacing the LR wire with a new one so I don't have to go messing with the whole harness. I'm pulling 12v strait from the battery so the wipers will park on their own if I shut the car off with the wiper switch still on. Quote Link to comment
ggzilla Posted November 16, 2012 Report Share Posted November 16, 2012 Rather tahn pull it straight from the battery, pull it from the Fusbile Link which connects to the starter. This is a master fuse to prevent fires. Quote Link to comment
FiveSeventyZee Posted November 16, 2012 Author Report Share Posted November 16, 2012 its on a remote positive terminal in my engine bay. The whole terminal should be fused, I'll recheck tomorrow, if its not I'll pull it from the starter instead. Thanks guys Quote Link to comment
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