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Index > @ the Pickup Bed (General Topics) > Thread: how exactly does the control unit work?
Thread: how exactly does the control unit work?
Mazdarx605


Redlining
Posts: 314
posted August 04, 2003 06:11 PM

how exactly does the control unit work?

Hello all,

In my quest to get this new ride of mine in running order i have been trying and winning (mostly)the battle with electrical problems.I know the blinkers were working before but now aren't.The back-up lights were not working but i have figured them out.The horn isn't working and I have yet to figure this one out yet.There is a wire plugged into the horn button and a wire on the horn itself but if i manually close the contacts on what i believe is the horn relay in the control unit i don't get any sound.Also the wipers do work and i see the relays clicking open and closed on the CU.The blinkers did work but now aren't.The battery seems really weak even though my trickle charger says its charged.Could my lack of a horn and blinkers be a problem with a really weak battery?If I turn on the running lights they work but are sorta dim and if I turn on the head lamps they barely glow and the markers almost totally go out.
____________
74 green REPU w/factory air
Early production 79 Spark yellow RX-7 GS


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wankel_dreams


Redlining
Posts: 293
posted August 04, 2003 06:22 PM

quote:
....Could my lack of a horn and blinkers be a problem with a really weak battery?...quote]

possible

may not have enough power to operate the relays. Try hooking the charger up to the battery while it is in the vehicle with the ignition on. That may give you enough juice to operate the blinkers.

OR

go buy a new battery since it sounds like you definatley need one because your truck isn't going to start with that one.
____________
74 wankel panther
77 REPU
79 rx7
89 Vert

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wankel_dreams


Redlining
Posts: 293
posted August 04, 2003 06:23 PM

OR....best yet, just try a battery from a different vehicle
____________
74 wankel panther
77 REPU
79 rx7
89 Vert

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Klaus43


Rotorhead
Posts: 1259
posted August 04, 2003 10:10 PM

And clean, clean, clean

all those connections! Sounds like your battery may have a dead cell... or just not be holding the charge, even as it appears to be taking... or: you could have a serious drain in your wiring. Another possibility: poor ground. You'd be amazed how something that simple can really screw everything up! Paint, rust, corrosion, dirt are all insulators...

       
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Klaus43


Rotorhead
Posts: 1259
posted August 06, 2003 08:48 AM

The location of the fuse block

on top of the 'shelf' under the hood also tends to exacerbate electrical issues...especially since many are missing the plastic cover... (may require periodic cleaning/maintenance...)

       
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Mazdarx605


Redlining
Posts: 314
posted August 07, 2003 03:31 PM

Update

I bought a new Optima battery yesterday,and installed it temporary until i can get some way of taking up the extra space in the box.The blinkers do now work again and the wipers are fine,but the horn is still a no go even with me manually closing the contacts on the relay.I guess i have to dig deeper.


Chris


____________
74 green REPU w/factory air
Early production 79 Spark yellow RX-7 GS


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