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How do you replace a relay if it goes bad mounted in the box like that? Wouldn't you want the tops of the relays exposed, to pull straight up and out, with the wires underneath?
You could but the box would have to be much larger. It's easy enough to unhook the wires and slide it out. They're just hot glued together and to the bottom of the box. A little prying with a butter knife pops them right out.
Hint: An Ethernet cable has 8 internal color-coded wires that are great as trigger wires for relays. Remember from an earlier post that relays need very little to switch. I've used this method to separate my fuse box and my switch box- running a single Ethernet wire through the firewall with the ability to control up to 8 accessories.
It won't hurt to use those. They look kinda cheap but other than that there's no reason you couldn't use them. 80A is referring to the amount of current they can handle. It's not like a fuse. I'd be willing to bet those won't actually handle any more current than your run of the mill 40A relay.
It won't hurt to use those. They look kinda cheap but other than that there's no reason you couldn't use them. 80A is referring to the amount of current they can handle. It's not like a fuse. I'd be willing to bet those won't actually handle any more current than your run of the mill 40A relay.
Ok sounds good that's what I was guessing just didn't want to get ones that won't work. I'm kinda on a budget right now I figured I'd give these a try and just replace them as they fail or when I can pick better ones up. I'm putting them in a waterproof container so hopefully the elements won't affect their performance.
It won't hurt to use those. They look kinda cheap but other than that there's no reason you couldn't use them. 80A is referring to the amount of current they can handle. It's not like a fuse. I'd be willing to bet those won't actually handle any more current than your run of the mill 40A relay.
if I'm using these 80a relays could I cut out the fuse between the battery and relay? Or would it be good to have one any way?
It won't hurt to use those. They look kinda cheap but other than that there's no reason you couldn't use them. 80A is referring to the amount of current they can handle. It's not like a fuse. I'd be willing to bet those won't actually handle any more current than your run of the mill 40A relay.
If I'm using these 80a relays could I cut out the 30a fuse between the battery and the relay?
I have been researching this myself, but instead of making the positive power switch on the relay by switches in the cab, I plan on completing the grounds on 86 on the relay to kick the relay on, then I don't have all those power wires going through the firewall... just grounds.. I am also looking adding an under hood relay/fuse box similar to what is in the Cherokee up front from the junkyard, there are many writeups on building Junkyard power distribution panels in the engine compartment. I also plan on using LAN CAT5 or CAT6 cable to go from the cab to the relays.
Edited: I redid the photo wiring diagrams and added notes plus wire gauge chart.
PS: Watts Divided by Volts Equals AMPS or W/V=A so 100 watt / 12 volts = 8.3 amps or (4) 100 watt lights = 33.3 amps - so 35+ amp wire, relay, and fuse is needed
No. You still need to be fused correctly. Fusing protects the wiring and your device. Not the relay. You may consider running a smaller fuse depending on the amperage draw from the accessories. The only fusing you can get rid of is the fuse between your switch and the relay. Only one fuse per circuit is needed.
Ok sounds good I will make sure I keep them in there!
03-02-2015, 09:53 AM
