Electrics
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Tuned
Joined: Mar 2013
Posts: 279
Likes: 3
From: North Port Fl.
Electrics
Who knows about amps & volts type stuff.. I have a clock I got from Jegs I want to put in my truck. Directions say 4 amps . I do not burn this one up. How do I get a constant power source 12 volt 4 amps . I had a stock '56 wiper motor once and hooked up 12 volts and it burned up (Too many amps)..... help
old and in the way
Joined: Jul 1997
Posts: 5,917
Likes: 1,047
From: Lovely Hueytown Alabama
if it is a 12 volt clock you won't burn it up by hooking it to any 12 volt source... thinking it will burn up... the clock will only pull what it needs to operate it properly. Don't know what the problem was with the wiper motor unless it was possibly a 6 volt unit.
I agree with using a 4 amp fuse.... but that doesn't protect the clock... it protects the rest of the electrical system in case the clock shorts out and tries to draw far too many amps ... melting the wiring and possible causing other damage... the fuse only allows the clock to draw 4 amps not prevent the electrical source from pushing more than that to it should it short out for some reason... Batteries don't push amperage into a device it only allows amperage to be drawn from it depending on the needs of the device
and to me that sounds like a lot of amperage for a clock
afa as hooking it up... Kurt told you right... constant 12 volt source (not switched with ignition) inline fuse at 4 amps and either a case ground or a ground wire hooked to chassis ground
later
John
I agree with using a 4 amp fuse.... but that doesn't protect the clock... it protects the rest of the electrical system in case the clock shorts out and tries to draw far too many amps ... melting the wiring and possible causing other damage... the fuse only allows the clock to draw 4 amps not prevent the electrical source from pushing more than that to it should it short out for some reason... Batteries don't push amperage into a device it only allows amperage to be drawn from it depending on the needs of the device
and to me that sounds like a lot of amperage for a clock
afa as hooking it up... Kurt told you right... constant 12 volt source (not switched with ignition) inline fuse at 4 amps and either a case ground or a ground wire hooked to chassis ground
later
John
Post Fiend
Joined: Sep 2006
Posts: 14,325
Likes: 14
From: Island Southeast Alaska
And after sitting for a month and the battery goes dead, ya can blame it on the clock for pulling power all the time. If this truck is not a daily driver than put in a battery disconnect switch or disconnect the battery if it is going to set all winter. Are ya sure it draws four amps? Or is that its max rating? It should draw like 1 amp or less I would think or you are gonna have a dead battery a lot. I just stuck a digital clock with its own battery to the dash with Velcro.
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