Any electrical guru's?

Vrabel

Vrabel

TOYAHOLIC
May 22, 2008
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Hewitt, NJ
I've developed a no start problem after doing some work on truck (brake lines & batteries). I have a p1800 code (No communication with FICM) after basic tests, all data suggests replacing FICM. Did it and didn't work.
I just realized I didn't have power going to the inj fuse (I only checked if blown originally). For laughs I jumped Ign relay, fuse powered and fired within 3 sec of turning key. pulled jumper and stalled instantly.
Does anyone know what powers this relay? Could it be anti-theft of a bad ign switch? If anti theft, how do you disengage?
 
J

jc1843

New member
Sep 27, 2009
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So Calf
You should change the ignition switch-- many have had this problem. Easy 5 minute job-- just pull the lower cover from the steering column. The switch is righty there-- pull it down, as it is held in place with a couple plastic tabs. Have the key to "ON" , before you slide the new switch in place-- that way it should be indexed correctly.
 
S

Sledheadxp800r

That was only my tow tune
Dec 13, 2010
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CT
Maybe try and disconnect both negative terminals for a while and then reconnect them. I've seen controllers go a little whacky sometimes just from disconnecting and reconnecting the batteries. Just a thought
 
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Vrabel

Vrabel

TOYAHOLIC
May 22, 2008
3,434
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Hewitt, NJ
I found the culprit. The Grey/ blk stripe wire going from inj relay to ecm was broken/corroded. From the looks of it, someone in the past poked a test light in the wire about an inch from ecm. There was a little green dot, and when I tugged on it, it broke right there. Soldered and shrink sleeved, she fired right up. Woo Hoo!
 
tinman22

tinman22

Member
Feb 17, 2007
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Stillwater NJ
well hopefully hes still out and enjoying it. theres not a great tune in there but with the injectors and twins should be a fun ride as long as the trans holds out lol
 
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