2005 m7 egt hookup

[bean2003]

My buddy has a 2005 m7 and we are wanting too hook up a Koso egt and we can't find 12 volts anywhere on the sled everything shows 5-6 volts ac on the meter we got the ac - dc converter but can't find a 12 volt source even has 5 volts ac at the taillight any help would be appreciated please text 4023403512

 

[Phizzer]

05 M7 only has AC power available to tap into EXCEPT the red wire at the fuel pump, this is 12VDC. I just tied my KOSO dual EGT gauge into this power source and haven't had a problem yet. You just don't want to pull a large amount of power from here.

 

[Phizzer]

Here is a link to my install...
http://www.snowest.com/forum/showthread.php?t=326288

 

[Rixster]

You might want to find out why you only have 5 volts. IT should be 12 AC everywhere except the fuel pump circuit, it is 12 volts DC. If you only have 5 volts you have a problem, and with a fragile and expensive as cat electronics are I would be finding that problem pronto !!

To answer your question, there is a aux. power plug behind the triangle shaped piece of aluminum covering up the steering post under the hood. its just a 2 wire plug with a yellow (positive) and brown (negative) wire.

 

[Phizzer]

I didn't think the 05 M7 had this plug in?? And just to clarify, it carries an AC signal. I was on the KOSO website last week and apparently the new EGT's will run on either AC or DC power.


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[Phizzer]

But Rixster is right, better figure out why you have only 5 volts on the circuit. I would check my DMM against a known 12V source (e.g. Battery)


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