Re: E-body 2-speed to 3-speed wiper conversion
[Re: 340clone]
#2021406
02/28/16 05:09 PM
02/28/16 05:09 PM
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Joined: Nov 2004
Posts: 507
340clone
OP
mopar
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OP
mopar
Joined: Nov 2004
Posts: 507
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OK, now I'm a little confused.
So should I hook up the 2-speed harness to the 3-speed switch? If so, should I use the two separate plugs (two and four prong) from the 2-speed harness, or re-set the wires from the 2-speed harness into the 3-speed plug (6 prong).
What would happen if I installed the 3-speed wiper motor and just kept the 2-speed switch. Or instead, added the 3-speed switch and just left off the red and green wire. (If I plug the 4-prong plug from the original 3-speed harness, that will eliminate the red and green wires)
Finally, if I can get my hands on a variable switch, that would work properly with re-setting all of the wires into the 3-speed plug?
BTW, the 3-speed switch I have is 3488764. There are three clicks so I don't think it's variable.
All help appreciated!
Last edited by 340clone; 02/28/16 05:48 PM.
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Re: E-body 2-speed to 3-speed wiper conversion
[Re: 340clone]
#2021469
02/28/16 08:10 PM
02/28/16 08:10 PM
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Joined: Nov 2004
Posts: 507
340clone
OP
mopar
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OP
mopar
Joined: Nov 2004
Posts: 507
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I'd like for it to work as original (3-speed) but if I have to settle for it only working on one speed that would be OK. I'm just trying to figure out how all of the different wiring scenarios work out...
Last edited by 340clone; 02/28/16 08:11 PM.
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Re: E-body 2-speed to 3-speed wiper conversion
[Re: 340clone]
#2021670
02/29/16 02:24 AM
02/29/16 02:24 AM
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Joined: Feb 2010
Posts: 114 Sunny FL
p4m
member
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member
Joined: Feb 2010
Posts: 114
Sunny FL
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Three speed motor and two speed switch will give you one speed only, hyperspeed, and the motor will only "park" where you shut it off at, it will not park properly. Same samey if you have a two speed motor and a three speed switch. The motors build the same, what determines if they are three speed or variable is the switch itself. If I take a motor and put it on my bench, it's three speed because I have a three speed switch mounted to my bench, if I move it across the shop to another bench it will be variable because I have a variable speed switch on that bench. I wire my switch with the correct color wires and terminal connectors that slide onto the spades on the switch. Wiring is the same on a car whether it's a two speed or a three speed because when they were coming down the line who knows what they were going to have, no wiring changes have to be done to go from two speed to three speed, car should be equipped to handle either. On my site I have a white sheet that Jim at JSRestorations prepared for me on how to wire and test switches since he restores switches who better to get the info from? I think also I have a diagram of the color to what spade on my site, upper right hand area blog/knowledge base. I post as much info there on mopars as I can get time to root through and upload. FYI: You'll need to also replace the crank arm when you're converting from a two speed to a three speed/variable speed motor. Two speed motors were concentric motors and three speed/variable speed motors were non concentric. The bends and angles of the opening for the output shaft are different because the motors operated differently. It's entire possible to put the motor in a bind because the linkage binds if you have a three speed motor and a two speed crank arm. You also can't use a two speed bushing on a three speed crank arm....I know, it's crazy, but it is the way Chrysler designed things and I'd hate to see someone go through all this trouble to overheat a motor because someone didn't say hey, don't do this or this. When you're doing a two to three speed conversion on an E body you also have to replace the drive link where on a B body you don't have to replace the drive link. http://passion4mopars.com/Mopar-2-Speed-to-3-Speed-Mopar-Wiper-Motor-Conversion_b_1.htmlhttp://passion4mopars.com/Testing-and-Wiring-a-3-Speed-Switch_b_46.htmlhttp://passion4mopars.com/Wiper-Motor-Wiring-Diagram_b_6.htmlhttp://passion4mopars.com/Mopar-E-Body-Variable-Speed-Wiper-Switch-Wiring_b_39.htmlHope some of my info helped with your endeavor. If you have any questions hit me up by email, that's the easiest way to contact me. I'm a one gal show over here and I'm like a fart in the wind most days...I'm in the back soaking, over at the other shop blasting, back over here acid dipping, might be at the bench, might be away from the bench, might be mid solder or mid cussing spree and can't get to the phone before four rings. Wish it were different and I was always able to answer, but sometimes I can't get there from where I am :-)
Last edited by p4m; 02/29/16 02:26 AM.
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Re: E-body 2-speed to 3-speed wiper conversion
[Re: 340clone]
#2021909
02/29/16 03:40 PM
02/29/16 03:40 PM
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Joined: Feb 2014
Posts: 1,708 central il.
second 70
top fuel
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top fuel
Joined: Feb 2014
Posts: 1,708
central il.
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When I bought my 70 cuda it came with the 3-speed switch instead of the variable switch and would only run on fast and not park correct as Kim stated. I looked and the two wire plug (red & green) wasn't hooked up. The minute I put it on the switch it started smoking. I talked to Jim at JS restorations and he said you need the variable switch to work correct and those wires with that switch causes a dead short. There are a couple of the correct 70-71 switches on e-bay. Good luck, Mike
Last edited by second 70; 02/29/16 03:41 PM.
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Re: E-body 2-speed to 3-speed wiper conversion
[Re: second 70]
#2021982
02/29/16 05:51 PM
02/29/16 05:51 PM
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Joined: Nov 2004
Posts: 507
340clone
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mopar
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OP
mopar
Joined: Nov 2004
Posts: 507
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When I bought my 70 cuda it came with the 3-speed switch instead of the variable switch and would only run on fast and not park correct as Kim stated. I looked and the two wire plug (red & green) wasn't hooked up. The minute I put it on the switch it started smoking. I talked to Jim at JS restorations and he said you need the variable switch to work correct and those wires with that switch causes a dead short. There are a couple of the correct 70-71 switches on e-bay. Good luck, Mike I think that's the ticket! I believe I have all of the mechanical parts together, but I will need the variable switch to make it work right. I will just have to pony up for the right switch! So with the variable switch, were you still able to use the 2-speed wiring harness and plugs? Thanks! Brian
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Re: E-body 2-speed to 3-speed wiper conversion
[Re: 340clone]
#2025516
03/06/16 03:45 AM
03/06/16 03:45 AM
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Joined: Nov 2004
Posts: 507
340clone
OP
mopar
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OP
mopar
Joined: Nov 2004
Posts: 507
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I think I finally have this sorted out. As I mentioned before, I have a complete set of '74 3-speed wipers from a B-body. (These will work on an E-body, right?) I am assuming this is the first year for the plastic bushings. This seems like a good thing because I can still get replacement bushings at the local parts stores if needed. I have a working 3-speed motor from a '74 as well, and it's all wired up and ready to go. Harness is good to go. Just ordered the proper variable switch tonight, so I that's all I am waiting on. Should be here in a few days.
Am I missing anything else?
Last edited by 340clone; 03/06/16 03:46 AM.
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Re: E-body 2-speed to 3-speed wiper conversion
[Re: 340clone]
#2025836
03/06/16 06:06 PM
03/06/16 06:06 PM
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Joined: Aug 2003
Posts: 1,145 ontario calif
ns1aar
super stock
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super stock
Joined: Aug 2003
Posts: 1,145
ontario calif
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I think the drive arm on the b-body is longer you may need one from a 72-74 e-body P/N 3431514
NS1AAR
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Re: E-body 2-speed to 3-speed wiper conversion
[Re: 340clone]
#2025984
03/06/16 09:16 PM
03/06/16 09:16 PM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Am I missing anything else?
Depending on the wiper motor your using, you may need to "re-clock" it to park properly, note bottom pic for clocking-tit located on transmission faceplate, the 7 digit numbers on the left hand side of the upper pic/print are the part numbers of various 3 spd motors and their approx parking index location
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