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 Post subject: 1972 Luv
PostPosted: Wed Sep 05, 2012 12:06 am 
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Joined: Tue Sep 04, 2012 11:43 pm
Posts: 2
Any ideas why this truck refuses to hold a charge?? Red C light is always on. And yes we are a bunch of girls with a cute little truck so please be kind and clear on what we can do.....(tired of paying the mechanics for nothing)


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 Post subject: Re: 1972 Luv
PostPosted: Wed Sep 05, 2012 2:04 pm 
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Joined: Wed Feb 22, 2012 10:47 am
Posts: 313
Location: Los Angeles, CA
This type of electrical problem could be caused by multiple individual issues - and perhaps a combination of them - and this may well be why you've spent so much on a mechanic thus far. Believe it or not, these weird little electrical issues can be enigmatic to a general mechanic too, and they'll be wary that they're getting in over their heads. You never know with wires!

Since LUV's have a reasonably simple electrical system, it's not uncommon to find that previous owners had taken shortcuts and, in a pinch, jumped wires to 'make do', and it's very possible that you or your mechanic simply haven't noticed the shortcut. Sometimes simple issues are not obvious, and short of replacing your wiring harness, the next best way to chase out electrical problems is to print the diagram, highlight the parts you care about(see below), and either go verify that the same situation is true on your truck, or do like I have done and bring your handy highlighted wiring diagram to someone who deals primarily with automotive electrical. It'll be like a cheat sheet to any decent mechanic, and he won't have to deal with the headache of all the initial troubleshooting due to inexperience with that particular model. Carbuerator mechanics are a good bet. Or an alternator rebuilder? You could try an auto sound guy as a last-ditch-effort, but they're the least educated of the lot.

The wiring diagram for the 72 is available in the reference materials section http://www.luvtruck.com/Information.htm Look for "Series 1 (1972) Factory Wiring Diagram (ZIP)"

Print it big, don't be intimidated. It is laid out like a picture of your truck from above - headlights at one end of the diagram, and tail-lights at the other end. You'll see an obvious battery on there, and perhaps some other parts you recognize. It only looks complicated at first, but ignore that, and mark it one piece at a time.

Get out your highlighter and:
Find the "C light" you mentioned. It may be called "Charge light" or something similar.
Find the battery
Find the alternator
Find the ignition(key shape)
Highlight all, and get a ruler so you can follow the lines. They're all too close, I know.

Now connect the dots with the same highlighter. The wires you end up highlighting are going to be your mechanic's roadmap. Ask him to verify those particular connections and report any differences. I am willing to bet you'll find the smoking gun there.

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 Post subject: Re: 1972 Luv
PostPosted: Wed Sep 05, 2012 10:01 pm 
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Joined: Tue Sep 04, 2012 11:43 pm
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Thank You so much I will so do what you suggested!! And thank you so much for the time you took to explain it all to me I really appreciate it. Cant wait to see what the problem is and fix it once and for all. we love our little Luv


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 Post subject: Re: 1972 Luv
PostPosted: Wed Oct 24, 2012 8:58 pm 
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Joined: Thu Oct 04, 2012 10:09 pm
Posts: 85
Location: Lexington, Washington
Any Idea as to why head lights will work on high beams and only one will work during low beam? any help would be liked. I just dumped $52.76 on new headlights and i'm still in the same pickle as before I replaced them. :(

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 Post subject: Re: 1972 Luv
PostPosted: Thu Oct 25, 2012 7:59 pm 
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Joined: Fri Sep 20, 2002 12:49 am
Posts: 3245
Location: North Mississippi
Mine did this once. Turned out to be a dirty fuse. Weird.


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 Post subject: Re: 1972 Luv
PostPosted: Thu Oct 25, 2012 11:34 pm 
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Posts: 85
Location: Lexington, Washington
It is fixed now. Felt like a complete idiot when I spent 3 hours trying to figure it out then my 13yr old cousin walks, up and notices there isn't even a fuse in the box. :roll: Completely embarrassed.

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