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Old 12-14-2009, 04:30 AM   #11
cliffyk
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i used a testlight on those pins as my first test as i attempted to diagnose them myself...the test light lit up a very bright Yellow!...whats next? should i buy a meter anyway ?
Just to be sure, this was when testing between 4 and 16, and 5 and 16?

If so then you better get a multimeter and check the voltage--if there's +12V between 4 & 16 and 5 & 16 the tuner should power up. Also, make sure there is 0.0V or close to it between pins 4 and 5.
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Old 12-14-2009, 04:04 PM   #12
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please read my last edit on the previous page. i'll check i have 0.0 between 4 and 5 now
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Old 12-15-2009, 11:54 AM   #13
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ok so i use my test light and pin 1 is the only one getting power...maybe the connector is upside down and pin 1 is actually 16...so i go with that... and i get the meter out.

i test between the first pin (which i'm assuming is 16) and pin 4... i get LESS than 12 volts but not 0. I do the same thing to pin 5...and it says Overload...
The connector housing is asymmetrical as shown in the diagram above, and is "upside down" as compared to the diagram, so pin 16 will be in the "upper" row, leftmost position as you look at the connector head-on. Pins 4 and 5 will be in the bottom row, in the center.

How much "less than 12 volts" between pins 16 and 4?

Also, I don't understand the "Overload" reading at all--is your meter auto-ranging? If not are you certain it was set to an appropriate voltage range?

There should not be any more than 14.4V anywhere on that connector--even with the engine running at 6500 rpm...
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum,
Delta Force tuned, Steeda UDPs, Ralco flywheel,
RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq


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Old 12-16-2009, 12:33 PM   #14
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ok will retest now
thanks for your help! i've been working 12 hour days
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Old 07-30-2014, 02:42 PM   #15
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Cliffy, this is a reply to old post, but please bear with me. I have an intermittent problem with the instrument panel on my 2003 GT convertible. From time to time the whole panel "zeros" (all the gauges go to zero), they may stay dead for 10 minutes or several days. The idiot lights still work however (traction control, abs etc). I suspect I have an intermittent ground problem at G204. However, I don't know where G204 attaches to the frame. You mention a possible issue with G204, do you know where it mounts to the frame? If so please shoot me back a response. Much appreciated.
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Old 07-30-2014, 02:42 PM
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