How to tap power from the fuse panel for a new radio
#1
Instructor
Thread Starter
How to tap power from the fuse panel for a new radio
I'm installing a new radio and I need to tap both a switched power source and a always on power source. I think I'd rather get both from the fuse panel. I was thinking I could tap the radio fuse for the switched (obviously) and maybe use the headlights for the always on source - instead of running another wire directly to the battery. Are there any cool connectors for the fuse panel that I can use instead of splicing and butchering my already ugly wiring harness ?? Thanks
#2
Drifting
There should be 2 or 3 acc spots on the fuse block where u can plug in a 12v line for your radio. Just crimp on a spade end and plug it in. Depending on how worn the writing is u might be able to read it , should say ign or somethin like that. They;ll be single access not double like a fuse. Just stik a meter or test light in to determine whether it's 12v constant or switched on with the ignition. Usually down towards the bottom.
ESU
ESU
#3
Melting Slicks
Member Since: Mar 2006
Location: Piedmont Va
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St. Jude Donor '11-'12-'13,'19-'20
Frank,
If the always on need is for a power amp of some sort, the fuse box is probably NOT the ideal place to connect. If there is high current draw, run straight to the positive battery post. I recommend strongly against tapping the headlight circuit for this.
If the always on need is for a power amp of some sort, the fuse box is probably NOT the ideal place to connect. If there is high current draw, run straight to the positive battery post. I recommend strongly against tapping the headlight circuit for this.
#4
Le Mans Master
Member Since: Jan 2006
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Yep, the headlight circuit had enough problems without Devo screwing with them. Use the existing switched 12v for the new radio. If there is a need for a memory wire, it is a very low current application so any hot term on the fuse block would be ok. If your installing an amp that needs a lot of juice, that is another matter, It should be connected thru a relay connected back by the battery.
#6
one source for unswitched power is at the starter. the thick battery cable goes to the starter solenoid attached to the top of the starter motor.
#7
i bought the GM adapter harness
http://www.installer-data.com/item/d...p?it=70-1677-1
and wired that on to the radio,this way it plugs in to the existing radio dash harness.
this gave me everything except the memory wire which i ran to a constant hot at the fuse box.
http://www.installer-data.com/item/d...p?it=70-1677-1
and wired that on to the radio,this way it plugs in to the existing radio dash harness.
this gave me everything except the memory wire which i ran to a constant hot at the fuse box.