Electrical Issue... I think?

[Dave 2000]

There was a gas engined 80 in the shop last year with similar problem, it turned out to be a splice in the loom near where it entered the bulkhead or firewall to you guys. When he unwrapped it, the splice was as green as a green thing! Cut in a new splice and all was well. I am wondering if this is where the problem lies, as I did not fix it I cannot be of more help, the guy is a friend and knows his way around leccy stuff so I did not get involved.

Regards

Dave

 

[70Cruza]

Electrical gremlins are in my opinion one of the least enjoyable while wrenching on our beloved trucks. I just followed @bloc on another electrical thread and Hes the kind of individual who can make sense of all the diagrams and wires. His suggestions were spot on and he made the distinction between earlier OBDI cruisers and the later OBDII vehicles which does make a big difference when trouble shooting. I just dropped 130$ on the paper edition FSM for my 1994 and I consider it 130 bucks well spent.

Id follow his directions and report back. Good luck

 

[70Cruza]

There was a gas engined 80 in the shop last year with similar problem, it turned out to be a splice in the loom near where it entered the bulkhead or firewall to you guys. When he unwrapped it, the splice was as green as a green thing! Cut in a new splice and all was well. I am wondering if this is where the problem lies, as I did not fix it I cannot be of more help, the guy is a friend and knows his way around leccy stuff so I did not get involved.

Regards

Dave

On this tip I do have some personal experience. I had a failed factory splice in this location. If you search my posts it will come up. My issue that led me there was with my headlights. I tore into everything, dash, kick panel, fuse block and found the failed slice at the firewall. Not sure if this would be related to the Starting/dying issues tho.

At the time I found a EWD and just took it one lil piece at a time. Threw some money at the stalk switch but ended up being the factory splice.

Best
Ruben

 

[Reelitchy]

Hope this helps.

 

[bloc]

@Reelitchy mind if I ask how you are posting those individual pages? I can dig up the pages on EA1,2,3 but could see this being useful for a thread I've got in mind on how to use the EWD.. All of the methods I know about are clumsy and inefficient

 

[bloc]

Electrical gremlins are in my opinion one of the least enjoyable while wrenching on our beloved trucks. I just followed @bloc on another electrical thread and Hes the kind of individual who can make sense of all the diagrams and wires. His suggestions were spot on and he made the distinction between earlier OBDI cruisers and the later OBDII vehicles which does make a big difference when trouble shooting. I just dropped 130$ on the paper edition FSM for my 1994 and I consider it 130 bucks well spent.

Id follow his directions and report back. Good luck

Yeah, $130 just for the wiring diagram sounds steep, especially in the world of $14 chilton's manuals, but one will save you that much at least. having the PDF will get you most of the way there but having a real paper copy to flip through, especially when you start needing to reference earlier pages in the manual to find connector diagrams, splice locations, power distribution charts.. WAY easier with a paper manual.

Fortunately the paper EWD for my 97 LX450 body was only $35 on ebay. Unfortunately that is only half of my truck.. but so far the PDF 94 version for my engine/transmission has been sufficient.

 

[70Cruza]

Well if you need anything for the 94 I'd be happy to look it up & send or text a pic of the pages. Let me know

 

[Reelitchy]

@Reelitchy mind if I ask how you are posting those individual pages? I can dig up the pages on EA1,2,3 but could see this being useful for a thread I've got in mind on how to use the EWD.. All of the methods I know about are clumsy and inefficient

I had a bear of a time doing it. I have the 94 manual on my Google drive. I opened the pdf file on my note four and captured it with my stylus- changed it to jpg- then resized it and posted it. I got the pdf manual from a link here on mud. I can look thru my older post for it and send to you if you like... well I'll try and find it and post for 80series93.

 

[Reelitchy]

Try this....

FSM

 

[80Series93]

Thank you Reelitchy - that is great. I will check EA2 connector this afternoon. Hopefully there is some sign of an issue there otherwise I'm going to be clueless..

Thanks everyone

- B

 

[bloc]

I've got most of the US FSMs but it would be super useful to have a way to quickly attach individual pages of them.. I'll see what I can come up with.

 

[bloc]

@80Series93 try this attached file for the actual shape of EA1,2,3

 

[bloc]

Trying a different format..

This is from a 94. An X means there should be no wire at that pin in the connector.. but again, this is for a US 94. I know from experience EA4 is very different in a 97LX450.

 

[bloc]

and in case anyone is wondering, I'm using Preview on a mac. Open the PDF, click "print screen > select area" and you can save it as a JPG which is easier to embed.

 

[80Series93]

Well I checked all 3 of the plugs near the fuse box in the engine bay none of them have a white/red wire on either side. I'm thinking maybe it's time for that auto elec.

- B

 

[80Series93]

To save screwing around could I just run another wire from the fusible link at the battery to the ignition switch? Or is there more to it than that...

- B

 

[bloc]

have you found a wiring diagram for your vehicle yet? it is possible that different market vehicles have different color wires. Whatever it is, the wire we are talking about should be the same color as what leaves the smaller of the two fusible links in the little black box. On US vehicles it is White/Red.

Also, did you find all three connectors there? EA1, EA2, EA3? they should look like the three in the picture I posted above. I seem to remember one being on a bracket and a little hidden, sortof inside the fender, pushed through a hole outside of the inner fender. It will branch off of the same harness wires as the other two directly under the fuse block though.

Technically, according to the power distribution diagram @jonheld posted in this post: Electrical Issue... I think? You could run a new wire from the appropriate fusible link to the ignition switch.. but that is not the correct way to do this.
YOU NEED TO GET A CORRECT EWD AND TRACE THE WIRE. Laying a new wire over the old when you don't even know that that is actually the problem isn't fixing the issue.. it is applying a bandaid.

Aside from the few stories here about failed factory harness splices toyota's harnesses are usually quite good.. they go to great lengths to keep things from chafing and degrading over time.

 

[80Series93]

Well I ended up being cheap and nasty and running another wire. Been driving for 3 days now and no cut outs. So I'm going to say even though I never found the initial issue, it is fixed.

Thanks for all your help and the diagrams. I have kept some of them for future reference.

- B