2002 jeep wranger ignition wire

Hey all.. Every site says 2002 wrangler ignition wire is blue..

It has 12v as soon as I turn the key to accessory.

Please help.

Thanks,

A true ignition may have power when the key is turned to accessory but voltage will drop out when cranking.

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Gary Sather

Myy dude.. Weird but okay.


Wiring it now.

There was all kind of different information online.

The 12 volt seemed to be going against bull dog and other sites.. I have 3 different diagrams for wiring the accessory 2nd acc and 2nd ignition.

Anyone know for sure.. Pretty annoying.

Always use a meter to confirm. Sorry I misspoke. An accessory will drop out when cranking. The ignition may have power switched rot accessory but will not to drop out while cranking while a true accessory will drop out voltage when cranking.

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Gary Sather

Okay thanks I will confirm that the acc drops when cranking.

But now comes a question of 2nd ACC or 2nd IGN etc..

I can't get right information!!

https://alarmsellout.com/support/diagrams/vehicle/JEEP%20WRANGLER%201988-2005.pdf

https://www.the12volt.com/installbay/forum_posts.asp?tid=47957

https://www.S P A M.com/2002-jeep-wrangler-car-security-wiring-guide/

https://diagrams.marktoonen.nl/printlist.aspx?MakeID=25&ModelID=17645

Someone please tell me if there are actually and 2nd anythings and what is the ACC or IGN.. (I will check tomorrow on ACC vs IGN)

Blue will be your Ignition 1
BLACK/ Orange your Ignition 2
BLACK/ Green your Accessory

As always test but it's not uncommon for an ignition that has +12v in the Acc, On, and Start positions. It of course isn't the feed that keeps the jeep running but it does power necessary systems for the jeep to run. BLACK/ Orange will likely test +12v in the On and Start positions. BLACK/ Green will likely test +12v in only the On position.

As for the difference between Acc vs Ign as it relates to aftermarket remote start systems. Ignition are wires required for a vehicle to run, Accessory are optional connections that power accessories. The wire that powers the heater/AC would be labeled as an Acc even though when you turn your key to the Acc position the heater/AC blower doesn't come on. Some wiring info mislabels things and may mark an accessory as a ignition or vice-versa, this is where testing comes in to straighten things out.

As already stated true ignition wires are hot in run and start (at a minimum), accessory wires drop out in the start position.

Catback, BMW and Porsche in particular need ACC in the start procedure.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Thank you for clarification.

Wish all the sites matched up.

Could you guys take a look at my other post where i can't get my vipe unit to turn on?

howie ll wrote:

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Catback, BMW and Porsche in particular need ACC in the start procedure.

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Noted, but is that ACC hot in start?

Definitely on BMW, possibly Porsche, on BMW ACC is treated as ignition 2.
Connect to your R/S ACC = no start!

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Hey guys BLACK/ orange is dropping to 0 while starting.. So i guess it is in fact an accessory wire.   Solid dark blue stays 12v while starting confirming it is ignition 1.

I'm left with BLACK/ green which i will test now and a WHITE/ red which is not mentioned on any site.. And then a few extra wires that don't look important.


Any ideas on that BLACK/ orange and BLACK/ green? I guess BLACK/ orange is an accessory?

BLACK/ green dropped voltage as well.. Making it a second accessory.

WHITE/ red is an accessory too.. I guess I'll connect it if certain things don't work.

12 Volts     pink/black and red     +     ignition harness
Second 12 Volts   
Starter     yellow     +     ignition harness
Second Starter   
Ignition     blue     +     ignition harness
Second Ignition   
Third Ignition   
Accessory     BLACK/ orange     +     ignition harness
Second Accessory     BLACK/ green     +     ignition harness


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Gary Sather

Gary after doing testing I found that is accurate. I wish the 12 volt post would get edited and fixed.

No there are always home market plus export variations and no one can be expected to keep up quickly. That's why you own a DMM.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

I'm wondering if I even needed to hook up that BLACK/ green second accesory.   According to bull dog the only site that doesn't claim BLACK/ orange to be a second ignition but a primary accessory.. It makes no mention of the BLACK/ green second accessory. Is it bad to wire it up even if it is not needed? I should have tested if anything didn't work without it.

The modified life says the same thing as bulldog.

Wire everything that goes hot on engine run plus of course starter.
You might be loosing either your audio, not really needed on a remote start or more importantly your HVAC.
Simple rule, wire everything.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

This shows the second accesory.

https://alarmsellout.com/support/diagrams/vehicle/JEEP%2520WRANGLER%25201988-2005.pdf

Is there anyway to fix the 12 volt page?

Howie that makes sense. There was even a WHITE/ red wire thats was another accesory.

That was not listeds anywhere. I didn't want to wire up a relay but everything looks great. I should of checked if the WHITE/ red actually showed power on rs. Maybe it didn't need to be powered by the rs which is why nobody lists it.

Stop shopping, you have too many accessories

Now that you know what's hot or not during cranking, find out what's hot or not with the key in the acc position.

Pretty interesting you haven't found any wires other than the blue that's hot during cranking and you've tested that as hot in the acc position.

But as howie was saying, find and connect what you need for things to work the hell with the rest of it.

I can think of one BMW where three extra wires exit the ignition switch. No idea what they're for, never connected them and no one lists them.
As for accessories, I think I now have 4 Wellers!

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Well in that truck the Ignition is hot in acc position as well ad acc obviously.

My question really was.. lets says this WHITE/ red wire is another ACC or IGN wire..

Nobody lists the wire on any wire guides.. and everything works perfectly.. I have seen issues where if 2nd ignitions aren't connected in a 2000 dakota that the transmission computer doesn't communicate with the PCM and threw a CEL (even though the car would start). Also when that 2nd ignition wasn't connected another issue was that the car would not show it was in park (something with the TCM)..

So basically my point is.. how do I know this mystery WHITE/ Red IGN or ACC isn't required (I guess the ACC is never really required unless reasons stated above, bmw...)

So let's say it is an Ignition wire, even though everything is working and all I hope there won't be issues.

In theory if it goes hot only on ignition and run, then it isn't essential for a remote start. If on the other hand it's hot on ignition, CRANK and run, then connect it.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

jsigna wrote:

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Nobody lists the wire on any wire guides.. and everything works perfectly.. I have seen issues where if 2nd ignitions aren't connected in a 2000 dakota that the transmission computer doesn't communicate with the PCM and threw a CEL (even though the car would start). Also when that 2nd ignition wasn't connected another issue was that the car would not show it was in park (something with the TCM)..

So basically my point is.. how do I know this mystery WHITE/ Red IGN or ACC isn't required (I guess the ACC is never really required unless reasons stated above, bmw...)

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That's an area where factory wiring diagrams come in handy to identify where wires go.

In general ignition wires break down into 3 sets
1. Hot in RUN and START
2. Hot in RUN only
3. Hot in ACC and RUN

The first obviously are ones you want to connect. The second are ones you want to connect as well because things like the heater/AC will be on such a wire. The last one is what would be a true accessory (in the key sense of the word - see note below) and least likely required when the car is running - it'll power trivial stuff like the radio.

Note: Definition of Accessory differs depending on view point. From the driver perspective, Accessory is the ACC position on the ignition switch. From the remote start perspective, Accessory is a power lead that drops out during cranking (e.g. the HVAC system)

That answers what I wanted to know. So basically 1 and 2 wire up as they are ignitions wires for the RS. The 3rd one is technically optional for most cars.. but necessary (acc wires).

To determine if IGN or ACC test if voltage drops at crank or not.

Golden.

Thanks!

Not quite.
1) goes hot on ACC and IGN drops on crank = live on run = ACC
2) goes hot on IGN, Crank and run = IGN 1
3) goes hot on IGN cold on crank, hot on run = IGN 2.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

howie ll wrote:

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Not quite.
1) goes hot on ACC and IGN drops on crank = live on run = ACC
2) goes hot on IGN, Crank and run = IGN 1
3) goes hot on IGN cold on crank, hot on run = IGN 2.

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What is your difference between ign and run? I haven't seen a car that has an ign position and a separate run position.

Also in what way are you referencing ACC, IGN 1, and IGN 2? Car labeling or remote start labeling?

To not confuse the blue ignition on the jeep would be Ignition 1 yes?

Howie is saying for 3 that if cold on ACC, hot on IGN, cold on crank, hot on run that is would be an ignition 2.

Clearly not an acc as it is cold on acc. But what is the diff between ign and run??

Simply ignition = gauges and panel lights on. Run = engine running.
7:50 pm, Day of Atonement and fasting for me I'm boogieing off!

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.