1974 CJ5 Which Internal Regulated Alternator to upgrade to and how - Page 4 - JeepForum.com
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post #46 of 49 Old 10-12-2015, 06:54 PM
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1930 CJ2 
Join Date: Jan 2009
Location: Salem/Alliance area
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I would try to stick to a fusible link wire or I bought a weather proof circuit breaker. I popped my original fusible link when I was winching once - had the rpm set to 1500, 70+A alternator, and about 10' into the pull I lost the charging system.

I don't recommend a fuse, as after a while the connections may become loose/dirty and then the holder heats and fails. Or you get an amp spike and it pops to easily. I'm going to be replacing my headlight fuse soon with a breaker as the terminals have come loose a couple times and I've melted 2 fuses. Corrosion from winter water splashed and loose connections caused some heat. Someday I'll have the time to do the relay upgrade.


1978 CJ5 5.0HO/T177/D300 TerraLow 4:1 kit, '86 D30/D44 3.54 WT axles w/Aussies, 'glass body, 33x12.5 ProComp A/T, TDK galv'd frame, 2.5 OME YJ lift - DD and weekend toy

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post #47 of 49 Old 10-13-2015, 05:27 AM
Mike Romain
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1986 CJ7 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant
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Fuse link wire is the best way to go. It sells by the foot and needs to be crimped in place, solder damages its properties.
Normally you use a link wire 2 automotive gauge sizes smaller than the wire being protected. So for a stock 10 ga. alternator wire, you use 14 ga. fuse link wire.

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post #48 of 49 Old 05-16-2021, 07:52 AM
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Good morning all. I see this form is a few yrs old. Hope some of you are still on here and can lend me a hand. I have a 1974 cj5. I also went with the speedway 21 wiring harness. Unfortunately I am not getting any support from them my old wiring harness had caught fire and melted. So I'm trying to figure out where each one of these wires go. I am hooking up the Gray wire from the alternator to the for pin where does it go in the dash. For some reason I cannot open any of the old pictures on this form. Million more questions to ask if you guys are still around thank you for any and all help
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post #49 of 49 Old 05-16-2021, 10:52 AM
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1974 CJ5 
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Follow the Speedway harness instructions. Brown wire off the two wire plug goes to ignition red wire off plug goes to center power stud and then to the battery side of the solenoid with fusible link on battery side. Forget about what was there before.



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