Ok, so I tried posting this question in an old high idle thread so that no one would get ticked off about another new high idle thread, but nobody answered my question. I was planning on doing the high idle mod today, but could not locate any of the stuff that I needed. I don't know much about electrical stuff, so I figured my best bet would be to go with the same stuff they used in the write-up in the tech files. I finally found the switch he used, but I cannot figure out what kind of relay he used. I know that the relay is not entirely necessary, but I want to be safe with it. What kind of relay is it in the wiring diagram? How many terminals does it have? How many amps should it be? I thought it might be a 5 terminal because of the 5 circles on the wiring diagram, but I went to radioshack looking for one and they or any other electronics store in town did not have one or did not even keep one in stock. All of them said that would be some kind of specialty relay.

 

i just used what i call a 3 pole switch. had it laying around. did a simply continutity test two see what ones are opend and closed by switch. connected one wire to each. the third pole is if i want the switch to be lit up when i turn on ect but i just left it blank

 

Doesn't there need to be a ground on that switch? And like I said, I know it doesn't need a relay, but I want to use one. So what are the specifics on the relay I need?

 

You should be able to get a relay at auto zone or any auto parts store. I can't see the relay in the photo to well as Im on my iPhone but a 10 to 20 amp would be fine. I just hooked mine to my upfitter switch and I think it's 15 amp.

 

I didnt use a relay, I actually just did mine today. But I agree with Shawn, 10 or 20 should be plenty as you are ultimately just sending a "signal" to the PCM. Actually just reading over the mod page, the wire you are using to supply the 12V is on a 10A fuse so probably go with a 10A Relay eh? But yea, you can just get relay at any parts store and use spade connectors to connect to the posts and then follow the instructions. Keep in mind that the tech page I believe you are referring to references an '03/'04 so the wire color on the "PTO" side might be different. I have an '05 and on mine its a solid orange wire. But yea best bet is a parts store for that. But IMO a Single Pole Single Throw switch is the easiest way to do it. I believe the author just used what he used because he had it and did not want to drill a hole through his dash. I drilled a 1/2 inch hole on the bottom side left of the steering wheel and it looks good. only took about 20 minutes to do this way. And you do not need a ground unless you want to activate a lighted switch. This is basically just a 12V "turn on" signal and the ground circuit is completed in the PCM. Anyway hope this helps.

-Torsten

P.S. According the the Picture next to the diagram on the mod page it appears to be a 5-pole relay. Maybe print out the page and take it into the parts store so they can see the physical layout of the relay?

 

Thanks guys. That was very helpful.

The picture looks like a 5 terminal, but then again, wouldn't each terminal be numbered? And if the top right circle was a terminal, wouldn't it have a wire coming out of it? I just figured that it was an internal terminal that closed the circuit when the switch was flipped. But like I said before, I know very little about electrical stuff so who knows.

 

I took mine a little further. I used two relays, one latching. I used a small push button hidden under the stearing column. You push the button to set high idle and latch in the relay to keep it in high idle until you touch the brake pedal, which sends 12v to un-latch the relay. A little more work, not much more money (the cost of a relay) but its neat and fool proof. I had a little extra time on my hands!

 

Uh i just put the switch i found and mine does the same thing when you press the brake pedal it cuts off....