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I keep blowing the 7.5 A IGN. fuse

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Old Sep 2, 2008 | 04:57 PM
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Jerred's Avatar
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I keep blowing the 7.5 A IGN. fuse

I have a 84 / 83 Toyota truck ( title says 1984 / sitcker on the cab says Oct.1983 ) with the 22R engine. First off my brake & charge light wont turn off. From what I understand it would be a deffective charge light relay that is causing this problem. From what I have read it would be located underneath the pass. kick panel. There is nothing there but the emmission control comp. The wiring diagram shows two yellow wires and a blk. & wht. wire going to it. There is a connector in that area that is not being used that has two green wires and a blk. & wht. wire in it. Could this be the connector for the relay and the previous owner just took it out?

Second, my 7.5 A ignition fuse keeps blowing. When this happens the charge light goes out & the engine will not idle. If I keep the gas pedal pressed a little it will run though. If I replace the fuse it idles fine until the fuse blows again which takes 10 mins. - 2 days. Any help would be appreciated. THANKS
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Old Sep 2, 2008 | 05:04 PM
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brake/charge light means bad alternator.. not sure what to tell you about the fuse situation..
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Old Sep 3, 2008 | 01:42 PM
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Thanks, I'll pull the alternator and have it checked. That ignition fuse is still confusing me though. The only wiring diagram that I can find that shows the ignition is the engine wiring diagram, but there is no mention of the 7.5 A fuse in the diagram. Does anyone know where I could find a complete diagram?
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Old Sep 3, 2008 | 01:51 PM
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A Factory Service Manual for your year truck (or similar) will have a complete wiring diagram:
- http://www.4crawler.com/4x4/FSM.shtml
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Old Sep 4, 2008 | 09:49 AM
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I pulled the alternator and had it checked. It is a good alternator. Any other ideas on the charge / brake light situation?
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Old Sep 4, 2008 | 05:59 PM
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rowdy235's Avatar
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From: Sweet Home, OR
on mine when the relay went out and caused the lights to be on I could just hit the ps dash and they would go out.
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Old Apr 12, 2022 | 07:30 AM
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Originally Posted by Jerred
I have a 84 / 83 Toyota truck ( title says 1984 / sitcker on the cab says Oct.1983 ) with the 22R engine. First off my brake & charge light wont turn off. From what I understand it would be a deffective charge light relay that is causing this problem. From what I have read it would be located underneath the pass. kick panel. There is nothing there but the emmission control comp. The wiring diagram shows two yellow wires and a blk. & wht. wire going to it. There is a connector in that area that is not being used that has two green wires and a blk. & wht. wire in it. Could this be the connector for the relay and the previous owner just took it out?

Second, my 7.5 A ignition fuse keeps blowing. When this happens the charge light goes out & the engine will not idle. If I keep the gas pedal pressed a little it will run though. If I replace the fuse it idles fine until the fuse blows again which takes 10 mins. - 2 days. Any help would be appreciated. THANKS
Did you ever find the problem? Dealing with the same thing on my 1987 4runner 22re any help would be appreciated.
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