2manyradios
Member
can someone tell me if i can use the 2 post on the fuse box under the hood for hooking up radios , the battery is located on the passenger side of truck , just wondering if i can use those post on fuse box..thanks
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2010 silverado auxiliary power
- Thread starter 2manyradios
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2manyradios
Member
are both post pos. or is 1 pos. and other neg. ?
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- Aug 17, 2010
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both are positive, though on some vehicles one used to be hot all the time and one switched but i think they have both been hot all the time for several years now. check it with a VOM to be sure.
grab negative from the frame or the body but NOT from the battery. if you ground on the battery and have a bad vehicle ground strap all vehicle electronics could ground back thru the radio and cause problems.
grab negative from the frame or the body but NOT from the battery. if you ground on the battery and have a bad vehicle ground strap all vehicle electronics could ground back thru the radio and cause problems.
2manyradios
Member
hey thanks, i had a 97 silverado and the post looked heavy duty , these post on the fuse box dont look to heavy duty...lol...but thanks for advice
wg5jim
Member
Do you have any pictures?
mmckenna
I ♥ Ø
Just did an install on my dad's 2012 Silverado.
One post has a 30 amp fuse, the other has a 40 amp fuse, or at least his did. He'll use one of them, likely the 30 amp post, for the trailer battery charging.
I ran his radio power over to the battery just because I didn't want to discover any RF hash on those posts. Sounds like they work fine. I've got to do an install on my brother in laws truck, pretty much identical to my dads, in a few weeks. Might try using the posts on his.
One post has a 30 amp fuse, the other has a 40 amp fuse, or at least his did. He'll use one of them, likely the 30 amp post, for the trailer battery charging.
I ran his radio power over to the battery just because I didn't want to discover any RF hash on those posts. Sounds like they work fine. I've got to do an install on my brother in laws truck, pretty much identical to my dads, in a few weeks. Might try using the posts on his.
2manyradios
Member
take some pics of the install if possible , im still driving around with it rigged up half ***, not sure where i can run power wire through the firewall but its a slow project for me being its winter , maybe summer ill get out there.
mmckenna
I ♥ Ø
He's out of town for a couple of weeks, but when I do my brother in laws truck (same model) I'll take some pictures. We used the large wiring grommet on the drivers side. Under the dash board there is a fuse box. That can be released and you can get to the inside easily. A careful incision with an Exacto knife on both sides allowed the two wires to be passed through. Seal up the engine side with some silicone when you are done.
There is a #4 cable from the + battery terminal that runs along the top of the firewall. I split loomed the new wire and followed the same path. Connected to the battery directly and the - to the fender. No noise, worked fine. I'll likely try the under hood fuse box post on my brother in laws truck.
Even though my dad runs a Yaesu, I ran a Motorola wiring kit. Nicer fuse holder, nicer wire, and plenty of length.
This was one of the easies installs I've done. I think we knocked the whole thing out in 3 hours, and not by cutting corners. An easy truck to do installs in.
There is a #4 cable from the + battery terminal that runs along the top of the firewall. I split loomed the new wire and followed the same path. Connected to the battery directly and the - to the fender. No noise, worked fine. I'll likely try the under hood fuse box post on my brother in laws truck.
Even though my dad runs a Yaesu, I ran a Motorola wiring kit. Nicer fuse holder, nicer wire, and plenty of length.
This was one of the easies installs I've done. I think we knocked the whole thing out in 3 hours, and not by cutting corners. An easy truck to do installs in.
wg5jim
Member
I ran coax and power for my install over the weekend. Here are some pictures on how I ran the cables through the firewall. I found a grommet that comes out on the inside above and slightly left of the junction box under the driver side dash. It wasn't real easy, I had to cut the grommet on the outside to get the wires through. A little tape and it's good as new. The grommet hole in the firewall, is in the bottom center of the pictures.
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