PCM issue w/convertion

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Oct 10, 2007 | 10:56 PM

gonzo 6.2

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From: oregon

PCM issue w/convertion

Not sure if this is the place to ask but lets see what comes of this.1992 K15 swapped in a 6.0 The cooling fans are set to come on at 199,the PCM fan 1 wire gounds at that temp but flashs on and off.fan 2 is set for 205 it never grounds.

I ran the test light to the batt + the other end to the fan wire for test.
A constant on/off WTF help please THANKS

Cant be in the EFI live???
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Oct 10, 2007 | 11:24 PM

G-Body

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From: Downers Grove, IL

Sounds like the on/off temperatures are too close.

If you have EFI Live/HPT go into the fans section, if the on setting is 199 set the turn off temp to 189.

Oct 10, 2007 | 11:24 PM

350SS

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From: Houston, TX

is {G1203} set to Series Parrallel Fans?

Oct 11, 2007 | 09:15 AM

gonzo 6.2

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I had mistakenly had AUX. I will reflash it with parrallel.

I will report back either way

Oct 11, 2007 | 11:53 AM

gonzo 6.2

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Well hell,no difference.When it reaches 199 as its set to it consisantly is on/off and fan 2 never will ground.I looked and relooked at EFI live there very well could be something i missed I just dont know.The PCM is 00 truck harness is Fbody 99.reworked by a discount sponsor

Oct 11, 2007 | 12:40 PM

350SS

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did you try to force the fans on using the bidirectional controls?

Oct 11, 2007 | 01:03 PM

gonzo 6.2

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From: oregon

Great idea I will and report back!

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Oct 11, 2007 | 01:55 PM

gonzo 6.2

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From: oregon

OK with the brain power here i know you guys can help.I am new at this EFI live so I dont pretend to know anything.
If i command high speed then my marked as # 2 fan blinks (it never did anything before) I hit low speed fan #1 stays steady like it should.
Maybe I dont understand whats going on or supposed to go on with high/low fans when I see #1 and #2 fans marked wires.

And to recap.The #1 fan blicks when the engine temp get to 199
My test light is hooked to 12v and light when grounded by PCM THANKS TO ALL