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switching the charge read wire
Posted: Wed Oct 14, 2015 7:49 pm
by turbo970
i read online and talked to a alternator rebuild guy about upping the voltage for short periods of time. he said to put a switch on the charge read wire. the Fat white wire in the plug. but he didnt say what kind of switch. could i use a heavy duty on off switch?
Re: switching the charge read wire
Posted: Wed Oct 14, 2015 9:22 pm
by mike-tracy
Im not advocating you do this, but you'd need a switch rated for the amperage you are going to run temporarily.
Re: switching the charge read wire
Posted: Wed Oct 14, 2015 10:19 pm
by robertpaige
Sounds sketchy to be honest. Lol but i'm with Mike.
Re: switching the charge read wire
Posted: Wed Oct 14, 2015 11:26 pm
by turbo970
he said it interrupts the reading so it lets the alt charge at a higher voltage
Re: switching the charge read wire
Posted: Wed Oct 14, 2015 11:28 pm
by turbo970
Re: switching the charge read wire
Posted: Thu Oct 15, 2015 6:24 pm
by Legacy777
Why are you wanting to do this?
Re: switching the charge read wire
Posted: Thu Oct 15, 2015 8:54 pm
by turbo970
so i can up my voltage during stereo comps.
Re: switching the charge read wire
Posted: Thu Oct 15, 2015 10:29 pm
by robertpaige
makes sense but i'd figure there would be some sort of external controller you can buy and wire in-between that can give you a specific voltage.
Re: switching the charge read wire
Posted: Fri Oct 16, 2015 12:24 am
by turbo970
i wish there was. but the shop guy said to put a switch on the wire that tells the alt to kick on, is suppose to fool the alt to make it think the battery needs some extra voltage
Re: switching the charge read wire
Posted: Fri Oct 16, 2015 4:16 am
by Legacy777
Re: switching the charge read wire
Posted: Fri Oct 16, 2015 4:45 am
by turbo970
so looking at this. i need to tap into the white thick wire. well on my subie the sense it the white 12 gauge ish wire
Re: switching the charge read wire
Posted: Fri Oct 16, 2015 11:59 pm
by Legacy777
You are correct, I was wrong earlier.
This diagram also confirms and shows it's pin 2.
http://www.surrealmirage.com/subaru/fil ... uting1.jpg
Re: switching the charge read wire
Posted: Sat Oct 17, 2015 12:46 am
by turbo970
so would a heavy duty on off switch work?
Re: switching the charge read wire
Posted: Sun Oct 18, 2015 4:35 am
by turbo970
bump
Re: switching the charge read wire
Posted: Sun Oct 18, 2015 6:51 am
by mike-tracy
Based on what you've said, the switch would be simply interrupting a low voltage signal wire. Therefore, you don't need a super heavy duty switch. Might be a good idea to use one anyways because in theory they are better built.
I think that this idea is going to chew through alternator however, but I am curious to hear the results.
Re: switching the charge read wire
Posted: Sun Oct 18, 2015 9:34 pm
by turbo970
its only gonna be switched off so to speak during stereo comps other wise it will be left on for daily
Re: switching the charge read wire
Posted: Sun Oct 18, 2015 9:51 pm
by Legacy777
turbo970 wrote:its only gonna be switched off so to speak during stereo comps other wise it will be left on for daily
Did you mean to say it's only going to be switched "on" for stereo comps and left "off" for daily?
Re: switching the charge read wire
Posted: Sun Oct 18, 2015 10:05 pm
by turbo970
yea my bad lol i was thinking in my head when switch is on the alt would do normal charge and switched off it will do the boosted charge
Re: switching the charge read wire
Posted: Mon Oct 19, 2015 11:26 pm
by turbo970
well i put a switch in and a relay charge goes up but the dash light kicks on.
Re: switching the charge read wire
Posted: Tue Oct 20, 2015 5:59 pm
by Legacy777
What does the voltage go up to?
Re: switching the charge read wire
Posted: Wed Oct 21, 2015 12:10 am
by turbo970
14.4 14.5. i put a diode in and it floats between 13.6 and 14.2. i need to find out if i put a second one in if it will steady things