WiringEwectwic Wipers

[FJnotCJ]

Wiring Ewectwic Wipers

I do not have the TNK motors yet, but I want to wire the current 25 project for wipers while the harness is out....looking at an early 40 wiring diagram I think it shows power from the fuse to a T-splice which powers two wipers and a switch(or power to the switch with unswitched power to the wipers) and switched power to the wipers, and a ground for each wiper....

So there are three terminals on a TNK...I'm guessing they need switched and un-switched power to go back and forth (reversereversereverse) and the three terminals are 1. one unswiched power wire between the two wipers (parallel?) 2. each wiper has a switched power wire 3. each wiper has a ground wire (to windshield frame or dash?)

How far off am I? I've seen pictures of the new ones, anybody install one and live to tell the tale?

Oh yeah, will be using an E-40 switch...

 

[foxfab]

Ditto, this is what I'm going to be doing on the rest using an early 40 switch too

 

[cruiserman]

If you get desperate I can see how I wired the wiper on my 25. It was a while ago.

 

[LandCruiserSteve]

My two (non-working) TNK motors only have positive and negative terminals. (Unless yours have an extra positive to be paralelled over to a second motor.)

I think it shows power from the fuse to a T-splice which powers two wipers and a switch

Or two separate switches. (Sometimes it only rains on just half of my windshield. )

 

[Living in the Past]

One wire from the fuse to the switch. Three wires from the wipers to the switch. The one from the terminal marked + on the wiper goes to the same post on the switch as the wire from the fuse. The wire from the terminal marked S on the wiper goes to the other post on the switch. I don't remember where the wire from the terminal marked goes - on the wiper goes but it just gets grounded under the dash somewhere around the switch. I hope this helps.

John

 

[FJnotCJ]

Clearer, thanks, kinda what I thought.....lets see if I have this right: wiper switch has three posts, battery power in to one of them, and from that same post one wire goes to drivers wiper terminal +, then to pass wiper terminal +....one wire from each of the other two terminals on the switch go to each wiper terminal S....then ground as desired

Your explanation makes the diagram much less mysterious, thanks!

 

[Living in the Past]

The wiper switch only has two posts. Only three wires in the harness for the wiper motors at the switch end. There is a splice in the harness by the first wiper so that the wires parallel to each wiper. The wire from the + terminal shares the same post as the wire from the fuse. that way the wiper have power to run to they off position when the switch is turned off. The wire from the S goes to the other post on the switch, this starts the wiper and keeps it running until the switch is turned off. There is a cam on the wiper that breakes the circuit to the + terminal at the spot where the wiper should stop, If the switch is on the wiper will get power thru the S terminal and keep running. The ground wire is there to make the wiper gets a good ground all the time and not counting on a path thru the windshield hinges.


John

 

[Cruiser_Nerd]

Great description John....I think I've got it figured out and I haven't even looked at it yet.

 

[LandCruiserSteve]

Mine only have two terminals on the wiper motor.

 

[Cruiser_Nerd]

Mine only have two terminals on the wiper motor.

Pineapple.

The only ones I've seen have been three terminal, but I haven't looked close at the '62 so I'll defer to the wiper experts. Also the mount looks different than the later motors. I wonder if that bolts up to the vacuum wiper mounting holes? Those are the same early style terminals as the switches.

 

[Living in the Past]

I've never seen TNKs like that before. Might even be original for your 25. My very early 61 FJ40 has the three terminal wipers. Your look like you just have a + and - posts. You can see the opening around one does no touch the case while the other one looks like it touchs it. which means you would have to stop it in the right position with the switch. On the vacuum wipers you would have to do the same thing. Just another thing about your non-USA spec 25 that is different. Do you think that it had two wiper switches from the factory? The other style with three terminal have a flat post with a srcew your look more like the posts on the back of the switches. Send those things out to me to try and rebuild. You don't have to worry about not getting your same ones back because I've never seen one like that before. I might even be able to rob parts from the later style to get them working again. I just notice Jim mention about the mount being different. My grey one has the mounting holes for that wiper. Two bolt holes closer together than the vacuum wipers with a adapter made to fit the vacuum wipers. I really think you TNKs were stock on your 25.

John

 

[Cruiser_Nerd]

Which means you would have to stop it in the right position with the switch. On the vacuum wipers you would have to do the same thing. Just another thing about your non-USA spec 25 that is different. Do you think that it had two wiper switches from the factory?

Ah, but the vacuum wipers have a lever so you can position them where you want in the off position (or have wiping action under load ). The only way Steve could get his wipers where he wants them would be to have two switches. So if it didn't come stock that way....... someone probably changed it early on.

 

[LandCruiserSteve]

Also the mount looks different than the later motors. I wonder if that bolts up to the vacuum wiper mounting holes??

Sure enough, Jim. When I pulled these TNKs off, the mounting flanges were lined right up with the factory holes on the windshield frame. (When I put the JCWhitneys on, I only used one hole that luckily matched up with the JCW flange.)

The only way Steve could get his wipers where he wants them would be to have two switches.

That's my guess as to why there's two switches (since there's no separate switch on the wiper motor itself.)

Pineapple.

Looks like you just saved Jamie the trouble of nick-naming my 25.

 

[LandCruiserSteve]

Just another thing about your non-USA spec 25 that is different. Do you think that it had two wiper switches from the factory?

That's what I'm beginning to think. Their mounting and the respective wiring behind the dash sure looks more factory rather than a PO mod.

Send those things out to me to try and rebuild. I really think you TNKs were stock on your 25.

Will do. Especially now that they might actually be stock.

 

[FJnotCJ]

The wiper switch only has two posts.


John

Hmmm....I've got four wiper switches that have three posts total, which is what the FJ40 wiring diagram shows...then again I have a light switch with six posts instead of (what I thought) the normal five...

I'm all schooled up, thanks for the help!

 

[LandCruiserSteve]

Ah, but the vacuum wipers have a lever so you can position them where you want in the off position (or have wiping action under load ).

Jim, do you have the vacuum motors or the TNKs?? (Just wondered since I didn't see any wiring coming up from the grometed hole in your inside windshield frame.)

 

[Cruiser_Nerd]

I've got JC Whitney specials on mine. It was raining so hard I actually turned them on today...............what a difference. I think they're wired up with a single wire that snakes up the right side where the tubing was.

 

[LandCruiserSteve]

I think they're wired up with a single wire that snakes up the right side where the tubing was.

Ah . . .

 

[LandCruiserSteve]

I think they're wired up with a single wire that snakes up the right side where the tubing was.

That gives me inspiration to route my wires up through the inside of the windshield frame. I hate having the wires visible. I'm gonna work on that this weekend.

 

[Living in the Past]

update on wiper switch

I checked a couple of wiper switches I have and they have three posts not two One of the posts has a larger hole for the two wires, while the others are smaller for the single wire. When the switch is off (CCW) no posts are making contact, with the switch on (CW) all posts are making contact. So I think the wiring harness must have the wire for the + terminal go all the way back to the switch from each wiper I have the wirng harness for the wipers from my 63 somewhere, I pulled the one wiper that was in it and the wiring harness before I bought from the junk yard. The 61's wiring harness is still in the cowl with the switch which is still installed and wired. I will pull the switch and see how it is wire. My 45 (1965) still has the TNK wipers with this switch. I will check them both out and let you know how they are wired. My guess is that with two poles in the switch it would last longer with the amperage for each wiper going thru it's own pole on the switch The way I said it will still work but by putting a fourth wire in the harness you're going to extend the life of the switch. I guess in Arizona I'm not really worried about it with a 106 days with no rain and counting Our wiper blades don't wear out, they dry rot first


Steve I will post a piture of how the wirng harness run with the TNK wipers from my 45 next week so you know how they were run from the factory. The FJ45 is wired the same way my 1961 and 1963 FJ40s were run. The wiring is run on the driver's side. It come thru the windshield at the bottom runs on the inside (exposed) of the frame then across the top to the two wipers. The vacuum wipers had a vacuum tube for each wiper run up each side. If yours had two wiper switches it may have been run up each side too. On the inside of the windshisld frame they should be some small holes for the screws tjat held the clamps for the wiring harness. Does your windshield have them on both sides or just one? I know there is a picture somewhere of a non-USA 25 with TNKs. The vehicle has no top on it and the back jump seats have straps by the arm rests. The picture is taken from the back. If you can find the picture it might be your best clue to how your wiring was run. Might even be able to tell if it has two wiper switches. I know I've seen it a few places on the web. I think Jim probably has it some where.


John