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Old 05-24-2013, 07:16 PM   #16
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Cut off switch for car battery blowing fuses


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Originally Posted by IAmSupernova View Post
I have no idea how much it's supposed to draw. I'm just doing what I was told to do after several discussions with several people. I have tried to see what current is being produced, by hooking my multimeter up to the place where the fuse goes and flipping the switch, but my multimeter only handles DC volts up to 10 amps and I got an overload reading.. So no I don't have a way to to measure it.

You really need to find this information out before you can continue. You could ohm the coil but I would rather you find a spec sheet on the coil current.

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Old 05-24-2013, 07:18 PM   #17
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Cut off switch for car battery blowing fuses


Any chance that the switch is shorting out under the dash when that panel is pushed into place?
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Old 05-24-2013, 07:30 PM   #18
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Cut off switch for car battery blowing fuses


Super... Incidentally, I'm not an automative technician... just sorta Saterday mechanic trying to help.

Did the solinoid indicate it's amp draw on the package. (Incidentally, I don't think that's the issue... I would think it's well below 10A@12V.)

I would make sure your mounting of that solinoid is making a good ground....use a file if necessary to ensure good solinoid to frame or engine connection/ground.

I don't think it causes your fuse blow at all, (which is just your relay draw causing the load), but under heavy load conditions at starting, I would have thought the max load on that solinoid would be 2 to 3 times 200A for its contacts.

Bottom line, your wiring looks fine to me... I don't have an answer.

Hopefully, some of the smarter guys will chime in... MPoul and Stick Jag... etc WTFAY?.

Best

Peter

Oh... Incidentally, understand your thoughts as to Dr Phil telling you to find/correct the automotive leak problem. I've got a Mom too.
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Old 05-24-2013, 07:33 PM   #19
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Cut off switch for car battery blowing fuses


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If that solenoid draws 20 amps to actuate then you may need to go to a bigger wire and fuse.

How did you try to find the current draw on the system? Back in the day when I did this for a living I sed to connect a test light between the battery terminal and the cable. If there was a draw the light would light up. I then would pull one fuse at a time until the light went out. That would at least narrow it down to a few items to look at. Some newer cars this may not work on though
Yes that's the way we still do it. Just more fuses to pull. That looks like an automotive solenoid. Not all are rated for continuos duty. But none of them should take more than an amp or two to activate. I would be looking for a shorted wire maybe where it's pulled through the firewall. Some solenoids need to be grounded also.
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Old 05-24-2013, 07:37 PM   #20
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Cut off switch for car battery blowing fuses


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Yes that's the way we still do it. Just more fuses to pull. That looks like an automotive solenoid. Not all are rated for continuos duty. But none of them should take more than an amp or two to activate. I would be looking for a shorted wire maybe where it's pulled through the firewall. Some solenoids need to be grounded also.

All solinoids need to be grounded
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Old 05-24-2013, 07:39 PM   #21
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Cut off switch for car battery blowing fuses


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Any chance that the switch is shorting out under the dash when that panel is pushed into place?
This is also a possibility.

BTW, kind of a related question about your leakage problem. Does that fuse shown in your last pic near the battery go to an amplifier by any chance?

Last edited by zappa; 05-24-2013 at 08:07 PM.
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Old 05-24-2013, 07:42 PM   #22
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Cut off switch for car battery blowing fuses


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All solinoids need to be grounded
You are right to clarify. I meant to say some are grounded through the case and some need a ground wire on auto solenoids.
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Old 05-24-2013, 07:46 PM   #23
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Cut off switch for car battery blowing fuses


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Yes that's the way we still do it. Just more fuses to pull. That looks like an automotive solenoid. Not all are rated for continuos duty. But none of them should take more than an amp or two to activate. I would be looking for a shorted wire maybe where it's pulled through the firewall. Some solenoids need to be grounded also.
That's what I am thinking also. I can't see it drawing so much current. I followed the OP's link and the solenoid is supposed to be continous duty for like a golf cart.
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Old 05-24-2013, 07:49 PM   #24
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Cut off switch for car battery blowing fuses


Should work fine then if wired correctly. But for the amount and time he has invested he could have paid a good shop to diag his concern. It's not to hard for an experienced tech.
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Old 05-24-2013, 08:04 PM   #25
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Cut off switch for car battery blowing fuses


Okay so I just went and used more battery cable to ground the solenoid to the negative battery cable (as suggested on another forum) because there was a 22 ohm (think that's what that symbol was for) resistance between the negative terminal and the case of the solenoid. I grounded it out so that there was a .5 resistance and went to test it. Flipped the switch a dozen times to make sure it was working, started it twice and all seemed fine. Then I went to get my wife and she went to flip the switch and it didn't power up. It blew a fuse again.. I'm going out again to check and see if it is the switch shorting out. We don't have an amplifier.
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Old 05-24-2013, 08:08 PM   #26
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Cut off switch for car battery blowing fuses


Are you sure you are not contacting any metal when you put that panel back in place causing a short?
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Old 05-24-2013, 08:10 PM   #27
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Cut off switch for car battery blowing fuses


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Okay so I just went and used more battery cable to ground the solenoid to the negative battery cable (as suggested on another forum) because there was a 22 ohm (think that's what that symbol was for) resistance between the negative terminal and the case of the solenoid. I grounded it out so that there was a .5 resistance and went to test it. Flipped the switch a dozen times to make sure it was working, started it twice and all seemed fine. Then I went to get my wife and she went to flip the switch and it didn't power up. It blew a fuse again.. I'm going out again to check and see if it is the switch shorting out. We don't have an amplifier.
A solid ground is needed but it has nothing to do with your fuse blowing. Yeah, check for shorts everywhere.
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Old 05-24-2013, 08:15 PM   #28
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Cut off switch for car battery blowing fuses


There's no short anywhere.. Not in my wiring anyways. I removed the switch from the panel and just let it dangle on the floor. Still blew the fuse. There's no where else for it to short out, none of the wires are damaged or exposed or making contact anywhere they're not supposed to.
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Old 05-24-2013, 08:19 PM   #29
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Cut off switch for car battery blowing fuses


Quote:
Originally Posted by IAmSupernova View Post
Okay so I just went and used more battery cable to ground the solenoid to the negative battery cable (as suggested on another forum) because there was a 22 ohm (think that's what that symbol was for) resistance between the negative terminal and the case of the solenoid. I grounded it out so that there was a .5 resistance and went to test it. Flipped the switch a dozen times to make sure it was working, started it twice and all seemed fine. Then I went to get my wife and she went to flip the switch and it didn't power up. It blew a fuse again.. I'm going out again to check and see if it is the switch shorting out. We don't have an amplifier.
Super... Still have no answer.... but 22 ohm is not a ground.

Not to be personal, but maybe your wife is hot.

best

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Last edited by MTN REMODEL LLC; 05-24-2013 at 10:14 PM.
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Old 05-24-2013, 08:19 PM   #30
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Cut off switch for car battery blowing fuses


If your positive of no shorts my guess would be a faulty solenoid then. I can't see any other reason for blowing the fuse.

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