Electrical Gemlin
07-10-2018, 06:02 AM
#1
Electrical Gemlin
suddenly I ran into trouble with my 93 22re truck.
First the em2 fuse link blew leaving me stopped. Replaced fuse drove a couple days no problem. Then the headlights started flickering. Then the next day the truck wouldn’t start. Battery gauge showed 8v. Replaced battery, started fine, was charging at 14v. Then driving to work it started overcharging up to 14.5v and the tachometer was behaving erratic. This lasted about 10 seconds. Then the truck died no battery power to vehicle. Towed home. New battery still reads 12v on volt meter. There does not appear to be any blown fuses currently.
Any ideas?
First the em2 fuse link blew leaving me stopped. Replaced fuse drove a couple days no problem. Then the headlights started flickering. Then the next day the truck wouldn’t start. Battery gauge showed 8v. Replaced battery, started fine, was charging at 14v. Then driving to work it started overcharging up to 14.5v and the tachometer was behaving erratic. This lasted about 10 seconds. Then the truck died no battery power to vehicle. Towed home. New battery still reads 12v on volt meter. There does not appear to be any blown fuses currently.
Any ideas?
07-10-2018, 02:31 PM
#2
07-10-2018, 03:43 PM
#3
it might not be overcharging in theory but typical v for this gauge and vehicle is 13.0-14.0v. I havent seen it go that high also as soon as it did the tach went out of control and soon after that car lost power so it cant be right. Cant find a short at a glance, might have to remove the harness and alternator for a proper inspection.
07-10-2018, 07:17 PM
#4
13.5 to 15.1V depending on temperature.
Yes, gotta dig into the harness, especially the think "B" Cable.
What's EM2? Care to share schematic so we can better help?
But you said your new battery has 12V on gage. How did you you know no battery power to vehicle?
Connections have bare, shiny metal tightly contacting bare, shiny metal?
Repeat: Got multi-meter?
Yes, gotta dig into the harness, especially the think "B" Cable.
What's EM2? Care to share schematic so we can better help?
Then the truck died no battery power to vehicle..
Connections have bare, shiny metal tightly contacting bare, shiny metal?
Repeat: Got multi-meter?
Last edited by RAD4Runner; 07-10-2018 at 07:19 PM.
07-11-2018, 02:41 AM
#6
13.5 to 15.1V depending on temperature.
Yes, gotta dig into the harness, especially the think "B" Cable.
What's EM2? Care to share schematic so we can better help?
But you said your new battery has 12V on gage. How did you you know no battery power to vehicle?
Connections have bare, shiny metal tightly contacting bare, shiny metal?
Repeat: Got multi-meter?
Yes, gotta dig into the harness, especially the think "B" Cable.
What's EM2? Care to share schematic so we can better help?
But you said your new battery has 12V on gage. How did you you know no battery power to vehicle?
Connections have bare, shiny metal tightly contacting bare, shiny metal?
Repeat: Got multi-meter?
07-11-2018, 05:01 AM
#7
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Did you replace it WITH a fusible link? If you just put a chunk of wire in there, you're bypassing what kept your truck from catching on fire a few days ago.
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07-11-2018, 04:43 PM
#8
I appreciate your help but That part is not applicable here. This is a 93 pu with 22re engine. The wiring goes from the battery directly to the 80 amp fuse aka fusible link. There are also 30a and 40a fusible links. I have replaced the battery, fuse box supply wiring, and all 3 large fuses. Everything is working very well again, charging to a max 14.0v 😉
tried including a photo but it’s not working off the phone anyway you get the idea case closed all good.
tried including a photo but it’s not working off the phone anyway you get the idea case closed all good.
07-11-2018, 05:01 PM
#9
This is a good guess I have had this happen before, blowing the battery fuse. I considered a shorted alternator but it appears not so. And yes I was referring to the 30a em2 fuse. I am still unsure why this one blew but as of now things seem ok.
07-11-2018, 07:47 PM
#10
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It's your truck (and your life); you can bypass all the fuses too if you want.
i wish you the best of luck.
07-12-2018, 06:48 AM
#11
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