2004 dodge ram diesel tach wire
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=110865
Printed Date: May 21, 2024 at 8:07 AM
Topic: 2004 dodge ram diesel tach wire
Posted By: Sessland
Subject: 2004 dodge ram diesel tach wire
Date Posted: January 21, 2009 at 9:55 AM
I managed to get myself confused with too much information.
Looking for a tach on a 2004 Dodge Ram DIESEL.
DEI Wiring "Tachometer dk. blue/gray ac PCM, orange plug, pin 34
Notes: The PCM is on the passenger side firewall. On diesel models the tach wire is at the ECM on the lower driver side of the engine, 60 pin plug, pin 24"
So I'm assuming that the blue/gray is still what I'm after only the location changes from the PCM to the ECM on the engine correct?
I was trying to figure out which pin is 24 but there are two 60 pin plugs down there and identifying what is going on down there is very hard.
Am I looking in the first 60 pin plug towards the radiator? or the 2nd 60pin plug closer to the firewall?
Replies:
Posted By: another-kelly
Date Posted: January 21, 2009 at 11:20 PM
paul h wrote:
DIESEL TACH SIGNAL Dk.blue/gray On C1 plug at ECM, The ECM is located on the lower driver's side of the engine. The C1 connector is the plug closest to the radiator
I got that off my wiring information for my 05 and they should be the same. I know for me, it was easier to get under the truck to access the wire. I removed the cover from the top as usual and crawled under the truck. It was easy to get too under there.
extracted the need to know info from his post. that help?
Posted By: Sessland
Date Posted: January 22, 2009 at 9:36 AM
thanks for the info,
I'll take a look today and see if I can't locate it. At least I have 1 less plug to look at 
Posted By: Sessland
Date Posted: January 22, 2009 at 12:19 PM
Paul what cover were you removing?
Posted By: paul h
Date Posted: January 22, 2009 at 5:45 PM
Sessland wrote:
Paul what cover were you removing?
If memory serves me....when looking over the truck into the engine compartment on the driver side, DOWN to the ECM, there was a black cover I *think* that snaps on & off?? When I removed it, then went under the truck, it was easier to get too......
Posted By: Sessland
Date Posted: February 01, 2009 at 11:43 PM
I finally got a chance to follow up on this and managed to get a real good look the wires.
I found something that looked like a blue/gray and connected my tach wire.
The alarm has a procedure for tach wire learning, and after following the steps it looks like things check out.
Now my problem is that the truck will crank but not start up.
I have the white wire from the compustar connected to the accessory (dark blue), then I have some relays for 2nd and 3rd ignition as well as a relay for 2nd accessory, but it still looks like something isn't being powered up when needed.
According to the DEI wiring guide I need the following from the wiring harness:
Dark Blue
Pink w Green
Pink w Yellow (14 awg)
Pink w Yellow (16 awg)
What am I missing?
Posted By: Velocity Motors
Date Posted: February 02, 2009 at 7:07 AM
What color is the head of the key that starts the truck ? If it's GRAY, you need a bypass module for the Sentry system. If its black , then check to make sure that you have the ACC outputs going to the ACC wires on the truck and same for the IGN wires. If the timing on the ACC and the IGN wires are not correct, the remote starter will only give a 1/2 crank and fail to start.
-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: Sessland
Date Posted: February 02, 2009 at 9:50 AM
I do have the gray sentry key but for testing purposes I have the key stuck to the ignition cylinder via tape, so it's not the security.
I'm not sure I understand what you mean by having the ACC outputs going to the ACC wires.
I have everything wired up according to the DEI wiring info, so....what am I looking for?
Posted By: loneranger
Date Posted: February 02, 2009 at 11:15 AM
ACC = Accessory
-------------
Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.
Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?
Moral - Never dismiss the obvious.
Posted By: Sessland
Date Posted: February 02, 2009 at 2:55 PM
loneranger wrote:
ACC = Accessory
if you read my post you'll notice I said I have everything hooked up as per the DEI wiring...so that obviously includes the ACC as well as IGN
Posted By: loneranger
Date Posted: February 02, 2009 at 3:59 PM
Sessland wrote:
loneranger wrote:
ACC = Accessory
if you read my post you'll notice I said I have everything hooked up as per the DEI wiring...so that obviously includes the ACC as well as IGN
I read your post very clearly. I'm not the one who stated he did not understand the meaning. Were you asking for a further explanation of how to connect the ACC wires? LOL! ------------- Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.
Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?
Moral - Never dismiss the obvious.
Posted By: Sessland
Date Posted: February 03, 2009 at 9:58 AM
I'm not sure if you're trying to be funny or don't understand what I'm asking, but I'll try to explain it better.
I have all the necessary wires hooked up from the alarm to the wiring harness including 2 extra accessory and 1 extra ignition via relays.
According to all the wiring info I've seen I have all the necessary wires hooked up AND the truck will crank just not start. What am I missing?
The only wire that I don't have hooked up on the ignition is a 10 awg Yellow/pink which is supposedly not needed for remote start.
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