The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)

- Projects and Builds (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=205)

- - My 52 GMC Build (https://67-72chevytrucks.com/vboard/showthread.php?t=648459)

Re: My 52 GMC Build

Quote:

Originally Posted by Advanced Design (Post 7430096)

That is very clean! What are the 10 relays controlling?

Thanks AD Well first I'm not using the key to start the truck. I'll take a pick of what I'm using. So top 5 relays are: IGN any thing I want powered with key: Amp, 12v power plug ect. Glow plugs, Left and Right door poppers, spare. Bottom 5: Starter, Lights, Fuel: anything related to motor running: fuel pump, Efan ect, ACC: all the secondary parts of truck running like transmission controller, gauges, ect. Then my heater. I am using a 30A electric heater 6000btu instead of coolant. Hope that makes sense.

Re: My 52 GMC Build

Quote:

Originally Posted by Chance48 (Post 7432358)

I need to learn a lot about this stuff. Why use relays in place of fuses? If a relay is a switch, what is the difference in powering a box full of fuses with one switch(key switch) or using a bunch of relays with fuse links? I need some quick education. I'm googling what I can but there is nothing specific to auto, or explanations of what and why? I'm kinda dude that needs to know why I'm doing something. Any of your help would be greatly appreciated.

Chance

Quote:

Originally Posted by Chance48 (Post 7432374)

So a relay powers another circuit from an existing circuit. Why not just have a separate circuit for what ever that relay is running with a fuse for it? Is this to reduce the amount of fused circuits?

Is this why some vehicles have two fuse boxes? Fuses protecting relayed circuits?

Thanks

Quote:

Originally Posted by Chance48 (Post 7432811)

I understand the solenoid. So there are different size relays(amperage)? Lowers, I'm sorry to beat your thread like this. I'm trying desperately to wrap my brain around this. I know nothing besides bare basics of auto wiring. Everything besides relays, haha. Which I'm getting the idea that they are an important an necessary part of the system. I've never had a relay go bad, never even had to think about a relay, I'm ashamed to say, I guess.

So say I want to wire in an e-fan. How would I use the relay or wire this setup up using a relay I should say? Thanks for the help.

Quote:

Originally Posted by Chance48 (Post 7432858)

Ok, lol...I got all nervous when I seen all those relays. I you tubed my butt off and got a general idea of it and how to wire them. As usual, I'm a long ways away from this in my build but the wiring is one of my largest concerns and gets me worried. I learned a lot tonight and my kind is at ease for now.

Chance

Sorry for the delay Chance. No I'm not using relays instead of fuses, I have 20 fused circuits. So most 12v switches are rated for 10A-20A I don't like putting 10A through a 10A switch. More like 2-5A through a 10A switch. So in comes a relay, much easier to change a relay too. A relay uses a small amount of power say 2A to switch a larger amount of power say 30-40A in a typical cube relay like what I'm using. Same as the starter solenoid on a car say 5A to spin your 300A starter. I am using more relays than I need to, partly because of how I am turning the truck on and part because overkill doesn't hurt. Don't worry about the wiring ask me or any other of the guys on here anytime. Hope that helped. Bob

Re: My 52 GMC Build

Thanks lowers, I've been on a research mission and studied up, a lot! I will need help and will be asking, thanks man.

Chance

Re: My 52 GMC Build

Quote:

Originally Posted by lower50's (Post 7434054)

No I'm not on Instagram and I have not seen it. Please post :)

Here you go... posted by stanceiseverythingcom
-

Re: My 52 GMC Build

Thanks John

This is my starter sw. I built it out of the original cable leaver that actuated the 2 speed rear end that my truck had originally. Now you just push and it actuates the sw under the dash.
These switches will be to turn the truck on. Upper hole will be for headlights.
Attachment 1484645

Attachment 1484646

Re: My 52 GMC Build

Quote:

Originally Posted by lower50's (Post 7434055)

Thanks Lower, it does make sense. I like the concept and flexibility it gives you as well as diagnostic / repairability if needed. No searching all over for a relay.

The starter button is way cool....reminds me of some of our heavy equipment starting.

Re: My 52 GMC Build

I'd like to see some more info on your heater when you get to that part.

Re: My 52 GMC Build

Nice, I like that starter button. And...I'm interested in your heater option also.

Re: My 52 GMC Build

Quote:

Originally Posted by Katrina/10 (Post 7435598)

I'd like to see some more info on your heater when you get to that part.

Quote:

Originally Posted by Chance48 (Post 7435628)

Nice, I like that starter button. And...I'm interested in your heater option also.

Here is the heater I am using. It is 6"X 4"X 5". Since the truck will be a spring, summer, fall truck I mainly need it for defog the window. I will be making up some ducting for the end of it to attach the defroster tubes. I think it will be mounted by the fire wall on the trans hump. Nice thing is I can put it anywhere.

http://www.my12voltstore.com/12_Volt.../sa12-3000.htm
Attachment 1485222

Re: My 52 GMC Build

Tonight I got the electrical panel mounted to the fire wall :metal:

Attachment 1485223

Attachment 1485224

Re: My 52 GMC Build

clean wiring is a joy to troubleshoot!

Re: My 52 GMC Build

that heater looks awesome, def something to think about. Let us know how it works and sounds. I spent hours routing my heater hose and getting coolant all over me. 1st heater/ac unit I had was garbage, so I had to replace it. Ever since I hooked up my heater I now can't seem to get an air pocket out of the system, either that or ironically my temp gauge is malfunctioning. anyway, I like the fact that this is a USA brand and they have some confidence in their product.

Nice panels

Re: My 52 GMC Build

Lookin killer. What's on the far left of your electrical panel? Are you planning to put a cover over it?

Re: My 52 GMC Build

Excited to see this truck out and about this summer! I had a shop in Breslau (beside the airport) up until April when I moved to London.

Re: My 52 GMC Build

That looks really clean!
Now I know for sure I have to make a new fusepanel....

Nice little heater too!

Re: My 52 GMC Build

High quality looking job on the wiring Lower. Make that 3X or 4X on the heater deal. The one in my '46 is a POS and I'm looking for an original to rebuild or a quailty alternative.
Rob

Re: My 52 GMC Build

Great heater idea. I'll save that site for later

Re: My 52 GMC Build

Quote:

Originally Posted by 99 to Life (Post 7438398)

Ya since my exhaust is in the way of any stock heater, I was looking aftermarket anyways. I hooked it up when I got it. I'd say it works similar to the high low of a 110V house heater for heat. Fan was quiet and moved a good amount of air. I would recommend so far.

Quote:

Originally Posted by Henney (Post 7438420)

Lookin killer. What's on the far left of your electrical panel? Are you planning to put a cover over it?

Thanks. Far left is my glow plug relay timer, usually on the motor. I'm thinking I will put some smoked lexan over the lower portion.

Quote:

Originally Posted by Jay92 (Post 7438741)

Excited to see this truck out and about this summer! I had a shop in Breslau (beside the airport) up until April when I moved to London.

Oh it will be out and all about.

Quote:

Originally Posted by RockinKees (Post 7438789)

That looks really clean!
Now I know for sure I have to make a new fusepanel....

Nice little heater too!

Thanks Kees

Quote:

Originally Posted by 47 Fasttoys (Post 7438873)

High quality looking job on the wiring Lower. Make that 3X or 4X on the heater deal. The one in my '46 is a POS and I'm looking for an original to rebuild or a quailty alternative.
Rob

Thanks 47

Quote:

Originally Posted by 65sub (Post 7439188)

Great heater idea. I'll save that site for later

Thanks I figure for the small amount of time it will be used, it's a much better option. Also I have a rebuilt 110A altinator.

Re: My 52 GMC Build

Ah sweet, that heater should heat that cab fine if it's sealed up good. Wiring looks legit. I'm still being a puss just thinking about my wiring, haha.

Re: My 52 GMC Build

Thanks for the link on the heater, I think it may work for me. A few years ago, I bought one of those heaters that plugs into the cigarette lighter, and it put out very little heat.

Re: My 52 GMC Build

Quote:

Originally Posted by Katrina/10 (Post 7440765)

Thanks for the link on the heater, I think it may work for me. A few years ago, I bought one of those heaters that plugs into the cigarette lighter, and it put out very little heat.

N.P. They have different sizes so what ever will work.

Re: My 52 GMC Build

Wow wiring takes forever and you don't get much to show for it. On Friday I made a new glow plug wire harness. Took 2.5 hrs for basically a piece of 8ga wire with 8 bullet connectors. Today I made the wire harness for the front of the motor: fuel on, tps, temp, alt.
Attachment 1486841

Re: My 52 GMC Build

Quote:

Originally Posted by lower50's (Post 7443909)

So true, and making it neat takes even more time! Looking good, though.

Re: My 52 GMC Build

I can firmly back you up on that wiring takes forever. Looming all the wires, heat shrink and making it neat. 60 hrs into a full custom wire job with bags isn't far off.

Re: My 52 GMC Build