89 pick-up blowing EFI fuse (1 Viewer)

[97winger]

Sure could use some help,I have an 89 pick-up with a 3.0 and a std. trans .It blew the EFI fuse so I replaced it .it worked for a day then blew again,when I replace this 15 amp it blew right away then a 20 amp and 30 amp.so the truck sat for two days now its working with the 15 amp.But for how long?I pulled a code 51 which is a switch signal but which one? Anyone have any ideals. Thanks

 

[Hilux]

code 51?...

via FAQ...


A number of FSM's from TTORA.com




I don't have an 89 downloaded, and my computers going...so don't take this the wrong way but, DL it, and look for it.





And BTW....














































Welcome!


**Official** newb welcome?.....is?...

 

[ms018kmf]

Unfortunately that circuit feeds a few things downstream, any one of them may cause the short. My truck may have wiring differences with your year but I had a similar issue from several wires rubbing together by the diagnostic connection. Here's the approximate location of my failure, and the main circuit to trace for shorts. This may be something completely different but I hope this helps.


Enjoy and welcome .

 

[WristPin]

There was just a thread about this.

 

[raydouble]

I've seen quite a few 22RE's have this happen when the oxy sensor wire has been burned to the exhaust, should be wired about the same, check down by the sensors.

 

[toyminator]

x2 on the oxygen sensor. This happened to mine during a snow wheeling trip. the o2 sensor wire melted on the exhaust and was causing a short.

 

[Jukelemon]

and stop putting in higher current fuses!!!

If it calls for a 15a and blows, you don't use a 30a. That causes all sorts of issues.

Here you go:

http://www.ncttora.com/fsm/1993/engine/26diagnosi.pdf


Good luck

 

[97winger]

Thanks guys I'll check the o2 sensor

 

[97winger]

THANKS MS018MF, You hit it on the nose .It was just as you described it the harness it all worn and I can see where it is shorting out. THANKS SO MUCH WHY COOL!!!!!!!!!!!! 97winger

 

[ms018kmf]

Wow, I usually seem to just regurgitate FSM pages and crap but that's freakin awesome.