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Old 05-03-2013, 05:05 PM
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Auto meter gauge help

I just picked up a auto meter phantom2 boost guage to mount on steering colum. What is the tap size to install fitting on intake and also what wire do I tap into to work with the dash lights
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Old 05-03-2013, 07:00 PM
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Do you have the intake off the engine?

You don't want to drill and tap an intake manifold while it's on the engine. All the filings and **** will go right into the engine.

The instrument panel/dash lighting is controlled through a field-effect transistor in the smart junction box, and the dash lighting is mostly LED.

I am unsure if you can feed aftermarket gauge lighting from this circuit without causing problems.

If anything, I would use the parking lamp output from the SJB, as this is designed to support the load of an incandescent light bulb.

In connector 2280D in the SJB, on pin 20, which is violet with a white tracer - is 12+ with park lights on output to the cab roof lights, or if not equipped, you can use pin 6 in connector 2280E, also violet and white - output to rear parking and license lamps.

Just my .02

Transistor driven circuits in the smart junction box typically do not like any extra loads on them, and the careful monitoring of the circuits by the junction box may show the extra current load as a short circuit and shut the circuit down using the programming in the module, which will likely cause you unwanted grief and require clearing of diagnostic trouble codes with the appropriate scan tool.
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Old 05-03-2013, 11:33 PM
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Thanks yea I dont have the roof lights so the SJB is located under dash. And I was thinking about taking off the cold air pipe from intercooler and taping the fitting there and put it back on truck after
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Old 05-04-2013, 06:19 PM
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Yes, SJB is under the right side of the dash, foot kick panel.

And the fitting is LIKELY 1/8 NPT but you need to measure it to be sure.

You may need to weld a bung into the CAC pipe, you may not have enough material to just tap the tube.

Hope this helps.

Also, you could use an aftermarket intake elbow that has bungs in it already, if your EGR stuff is deleted.
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Old 05-05-2013, 07:46 AM
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Ive seen a few posts were people have put them on the cold pipe
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