Re: Power Window Relay Mod?
 

I was doing some drawing on my existing window relay diagram and you could add another express module for express up but, the harness would start getting a little busy. I may start offering a variety of harnesses I've designed for my 86 shortbox if there is any interest, like dome light delay, courtesy lighting on with IGN key off and killed when door opens, auto-on headlight mod, and I also adapted the compass and ambient temp from a donor Blazer for use in my truck.

Most people imo aren't much into electrical upgrades like these it appears though-its more of a personal challenge for those who like electrical stuff....lol

Re: Power Window Relay Mod?
 

I'm into it. I want all those luxuries the new stuff has. It makes it a lot easier to drive the ol girl when it doesn't feel like you have to step back into the stone age.

Re: Power Window Relay Mod?
 

that would be nice

Re: Power Window Relay Mod?
 

Lurk

Re: Power Window Relay Mod?
 

x2

Re: Power Window Relay Mod?
 

Now that I've got all 4 windows working in going to tear the door panels off again and do this. Wish I would've seen this earlier today. Lol can't wait to have my own personal guillotine :-)

Re: Power Window Relay Mod?
 

I replaced my driver's window switch and the window sped up.

Then I read this thread.

I wonder if poor contact in the switch adds too much resistance, and bypassing it with a relay makes the switch a non issue since the switch with the relay mod no longer carries current for the motor?

Re: Power Window Relay Mod?
 

There's a variety of reasons why adding relays speed the motors up. To begin with, as window motors age, they draw more current. This current travels through the switches and over time, they can overheat them causing partial melting of the plastic housing and because the door panels are poorly sealed from the elements, the contacts within them corrode easily. All of this adds to resistance which is never good.

By using relays, you don't have to deal with overheating and instead of the switches as a means of transferring current, they merely act as ground triggers-allowing the relays to handle the high load which they are better designed for vs. switches. Most new vehicles have a type of solid state relay design for this which makes it easy to incorporate express down features-as do my kits. Moreover, relays are just more efficient and its a simple upgrade to do.

Re: Power Window Relay Mod?
 

When I get my windows working again out I'll give this a shot. My windows are slooooow.

Re: Power Window Relay Mod?
 

Could someone post a diagram for the passenger side. how does it receive power from the drivers switch? There are 2 relays per window. I have a crew cab so would I need 8 relays on the drivers door, or would the individual window relays on each door be wired to operate off the signal from the drivers switch.

Re: Power Window Relay Mod?
 

2 relays per door. The relays come into play after the switch. When you close the connection from either switch, the power goes to the specific relay on the door that the window is to be adjusted.

Re: Power Window Relay Mod?
 

I also have a crewcab, and a batch of relays otw to me as I type this.

Trying to get a better picture of what everyone is talking about... I (and others with crew cabs, really anyone with power windows at all.

Each door gets two two relays (Up and down). Each relay triggered from the switch that controls that doors window. So the wiring would be the same for front passenger door and both rear doors if applicable as it is for the drivers door correct?

Re: Power Window Relay Mod?
 

Yes, that is correct. There is a pink power lead that daisy-chains from switch to switch for power-that's what you use to power the relays. I use Packard connectors/terminals and solder everything so if you have to ever pull the doors off, you can simply dis-connect the wires and leave the relays in place behind the panels. And, I color code all leads to make it simple. This is something a lot of people can do, however I like a factory appearance with regards to upgrades like this. It's a sweet mod that for sure!

Re: Power Window Relay Mod?
 

Thanks for all the info guys.... Gonna do this soon!

Re: Power Window Relay Mod?
 

Attachment 1234813I have my relays and I am going to try this next week. GMachinz did you connect the pink wire to the relay or are you stating the pink wire is the initial power source? This post confused me a little. I found a diagram I will try to attach but I thought we were connecting the drk blue and brown wires from the switch to the relay.

Re: Power Window Relay Mod?
 

watching this.

Re: Power Window Relay Mod?
 

Yes, you are however, this diagram is very confusing....I wire mine completely different-the PNK lead that goes to each switch gets cut with about 6-8" left at the switch-this gets grounded from the switch and the other end goes to power each relay. This is where my harness utilizes HD step-down connectors to keep it clean.

The diagram in my kits I designed using the factory wiring diagram but with the addition of relays, I kept the color coded routing so its easy to follow/read. And, I also make use of express modules and its cleanly integrated into my diagrams as well. This diagram here works but its not very installer friendly as far as making sense of each wire lead.

I'm a graphic designer too so I make sure my diagrams are easy to follow and understand-I don't like the one posted above for its lack of details in wire routing.

Re: Power Window Relay Mod?
 

So you are using the pink wire as your constant power to the relay instead of running a new power source?

Re: Power Window Relay Mod?
 

Yes-this way, you don't have to try and get into the accessory door boot-it's a fused 30A circuit which is plenty. Now everything can be done at the switch-no need to get under the dash at all. Of course, I can build a complete replacement harness if that's what somebody may need....I'd need more info on an individual bassis though.

Re: Power Window Relay Mod?
 

Do you make a kit?^^

Re: Power Window Relay Mod?
 

Yes, I have quite a few kits including all variations of squares.

Re: Power Window Relay Mod?
 

Link to kit?

Re: Power Window Relay Mod?
 

http://67-72chevytrucks.com/vboard/s...d.php?t=605271

This is a standard 2-door kit. Everything is done right at the switch. I also have these kits available for 4-doors, K5's with relay powered rear glass, suburbans-including rear glass and all harnesses can be wired with Express Down modules for auto down windows.

Re: Power Window Relay Mod?
 

I wanted to bump this back to the top because it is one of the easiest mods to do and maybe the most bang for the buck out of any mod. I did not go all the way to the battery. I spliced into the original PINK wire to pull power. Just eliminating the switch doubled the speed of my windows. The hardest part was removing the door panels. (maybe soldering the main power splice but that is because my iron sucks)

I happen to have barrel crimps so i ordered the relay with a socket harness. with the harness you just need to crimp red ring terminals to 87a and 86.
and a new package 56 to 30 and 87. Your done...

http://www.delcity.net/store/Relay-&...ss-Kit/p_72563

if you are slightly confused about the wiring, don't be.

The thing you have to remember is,,, the source power (from the switch) goes to 87. (not 30) 87a is needed to ground the motor.

87 Pink main voltage wire pre switch.
87a ground
30 power going to the window motor (blue or brown,, up or down)
86 ground
85 trigger wire power from window switch (blue or brown,, up or down)

Anyway, thank to the OP for the information, good work.

Re: Power Window Relay Mod?
 

TYPO

this is wrong
The thing you have to remember is,,, the source power (from the switch) goes to 87. (not 30) 87a is needed to ground the motor.

this is correct

The thing you have to remember is,,, the source power (before the switch) goes to 87. (not 30) 87a is needed to ground the motor.

Re: Power Window Relay Mod?
 

Tag for reference. Thanks guys for your contributions. I will be doing this soon.

Re: Power Window Relay Mod?
 

Good one to bump up. I am going to need it soon.

Re: Power Window Relay Mod?
 

Bringing back an old thread because I'm about to do this. Question is I understand the 2 relays per window (up and down) but since the driver side controls the passengers side as well, will that switch speed up the passenger window as well?

Re: Power Window Relay Mod?
 

The blue w/white and tan are the triggers for the RH side. But essentially, your RH window relays mounted at the RH door panel will be relay powered and will still be activated from either switch....so yes the RH window will be faster than stock. Voltage drop with relays is very small-much better than routing voltage through the switches so it's a good deal all around.

Ok makes sense. Just wasn't sure since the LH relays don't touch the blue/wht stripe and tan wires on the switch. Essentially you'd need another set of relays on the LH door is what I was thinking.
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Re: Power Window Relay Mod?
 

You should put the relays as close to the accessory as possible-so ideally put the RH control relays on the RH door.

I get that. Just got thrown for a loop with the double driver switch and the single passenger switch. I'll be doing relays on both doors
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Re: Power Window Relay Mod?
 

Re: Power Window Relay Mod?
 

Those are junk....but they will prolly work....for awhile....keep a fire extinguisher handy lol

Also with the cut wires from the switch, do you just turn those into grounds or just electric tape them off
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Re: Power Window Relay Mod?
 

There's a few ways to do it. If it's something you plan to tackle, there are a myriad of diagrams all over Google showing how to do it. I don't do it the typical way since I like to convert to a ground trigger but that involves modifying the switch connector leads itself and it is better to go with a new harness in a lot of cases then....and that allows for nicer upgrades like auto down, etc. and while a basic relay splice kit will work, there are a few ways to do it. I'd say look for a diagram you're most comfortable doing yourself....kinda hard to suggest how since a lot of my components are commercial grade and not found in any of your typical places.

Re: Power Window Relay Mod?
 

Do you have ones you would recommend?

Re: Power Window Relay Mod?
 

I do depending on what you'd like to do. I have:

Relay splice kits for stock setups
Relay splice kits w/auto down
Relay splice kits w/auto down/up

Full replacement harness with or w/o ground trigger and still the previous listed options.

Re: Power Window Relay Mod?
 

Just regular relays you have found reliable.

I like the auto up and down but that takes some wiring changes Im not sure Im up to.

Re: Power Window Relay Mod?
 

Well I got it all wired up properly but got no power. I used the pink wire from the switch as my power source to both relays. From switch, brown and blues to 85 (both relays) and from the motor brown and blues both to 30. Tied my grounds together 86 and 87a on both relays to one ground wire. I go to test and nothing happens. My ground from the relays were drilled into the door. Am I missed something? Do I not have an adequate ground from the switch?