Power Window Relay Mod?

[mikep87swb]

I am definately going to do this mod also..... I just have one question.... Do you need to wire up something additional for the driver to put down the passenger window... Or is that covered in the directions and I just missed it..... I would assume you have to run a wire from the switch on the drivers side to the relays on the passengers side to activate the passenger window from the drivers side???

If I am wrong I apologize..... but I am just wondering what has to be connected in that scenario...

Thanks
Mike

[homemade87]

This is a great mod. It was a simple mod and well worth doing. I did mine when I had the truck apart. I put my relays just above where the wires go out threw the fire wall to the doors. I felt they would be better protected from the weather. I also cut my wires to the motor about 2" from the motor and added a much larger wire all the way down to the motor .I pulled the original wire back up threw the door jamb to the inside of the fire wall to run the relays. 2 wires up to the relays from the motor, and 2 large wires down from the relays to the motor. It works great. The first thing my friends show off about my truck is the windows in action.

[juiceman650]

Nice, I was thinking of replacing my motors because of how slow they are, but I guess I'll just do this mod and see how it works.
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[tashspop]

my next electrical mod after i finish under hood.

[conman585]

been working on this all day now and all i get is a clicking sound from the relays. I've retraced my wiring and its all correct. I don't get what I'm doing wrong and its driving me nutts.

[mikep87swb]

Hey there I am working on this also and for me it works perfect
Can you give me some more insight on how you have it wired and I can hopefully help. My drivers side is done and I will finish up my pass side tomorrow.

Thanks
Mike
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[conman585]

Broke out the test light and found my problem. It ended up being a $1.32 splitter that was interrupting my power source. I just took for granted that it wasn't impeding the flow from the junction block. Windows are definitely quicker now.

[mikep87swb]

Hi there.

I am also in the process of doing this mod to my windows and it's definately awesome... Drivers side works perfect, but I have a small issue with the passenger side that I beleive is not even relay related...

Before I did this mod my passenger window would only go down a few inches and then stop..... then I had to wait a minute or so before i could get it to continue down another few inches...

With the relay mod I thought it would fix that issue.... but it did not and now it goes down the same 5 or 6 inches but of course faster before it stops....

At this point I am thinking it's a switch or motor issue.... what else could it be and how can i test to see which one it really is before I go and buy both and replace...

Any help is certainly appreciated...
Thanks
Mike

[qu1cks1lver56]

bypass the switch and just touch the wire to power. if it still does it, possibly motor or other related

[C10_Dreamin]

Originally Posted by qu1cks1lver56

bypass the switch and just touch the wire to power. if it still does it, possibly motor or other related

Has anyone tried bypassing everything and going directly from the battery to the motor just for troubleshooting?

Id try but I'm away from home for another two weeks...

[bigd65]

I'm still contemplating getting rid of the PW. I already have some manual regulators. I really need to make up my mind
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[gmachinz]

I took it a step further with my harness by converting the switch to act as a ground trigger:...this way, the switch carries virtually no amperage-just a ground trigger for the relays. And, the express down feature is that much easier to install.

[48cj2a]

Originally Posted by gmachinz

I took it a step further with my harness by converting the switch to act as a ground trigger:...this way, the switch carries virtually no amperage-just a ground trigger for the relays. And, the express down feature is that much easier to install.

How do you get express down?

[gmachinz]

Depending on what vehicles you pull them from, the wiring layout might vary but, there are basically 4 wires. One is constant 12V, another is spliced in parallel with the wire to run the window up and then the wire to run the window down gets cut and each of the other two module wires go to each lead. The logic behind the relay/module is such that when a sudden spike is seen when you press the window switch down, there is a capacitor of sorts that "holds" voltage to maintain power to the window motor. After usually 6-8 seconds, the solid state relaxes back to a normal state.

[Skunksmash]

In! I'm gonna do this to! And turn 'em into automatics, maybe invest in a higher quality switch than those chrome factory ones that always seem to have problems.

If this relay mod has anywhere near the same effect that it has on the headlights, it will be well worth doing. Headlights are 10x better than those factory junkers. Here's what you want for full auto. No sense in just doing auto down, only to have to hold it to go back up.

Amazon.com: Install Essentials 530T Window...

[gmachinz]

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

[truckfan]

Lurk

[cjlloyd81]

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 :-)

[VTX-Black]

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?

[gmachinz]

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.

[Grumpus Monkus]

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

[DallasTxImpalaSS]

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.

[mrolds88]

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.

[cjlloyd81]

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?

[gmachinz]

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!