Fuse 22 source of battery drain
03-21-2010, 05:32 PM
#1
Drifting
Thread Starter
Fuse 22 source of battery drain
I am going through my electrical system, cleaning grounds and chasing drains. I wired a 12v bulb up to a blown fuse and inserted into each fuse slot. The only slot that lit the battery was #22, radio booster. I understand this is the constant power source for the radio, but should it be hot the whole time, or is that a dumb question considering it's constant? How much should it be drawing and could it be a source for a battery drain?
03-22-2010, 10:14 AM
#2
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Yes, the fuse should always cause the test light to illuminate. You can check the circuit draw by connecting an ammeter across the empty fuse contacts, but be wary of blowing the internal fuse if you use a small multimeter. If the only draw is the radio constant power, the draw should be in the very low milliamp range.
You should also remember that many of the circuits on the 928 are unfused, so you cannot assume that pulling fuses will find a current draw.
You should also remember that many of the circuits on the 928 are unfused, so you cannot assume that pulling fuses will find a current draw.
03-22-2010, 10:58 AM
#3
Electron Wrangler
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Well - there is no (CE panel) fuse for the radio - this is for the amplifier (booster). I don't understand how your test light is wired - is it just acoss the 2 fuse contacts ? if so it should not illuminate unless current would be flowing through the fuse - this means the equipment is on. The radio boster should only be on when the radio is also turned on. Since there is no fuse for this you can't assume that pulling all the fuses will keep the radio off, so check its turned off... OR if it was off: maybe the trigger wire for it is not wired up correctly.
Alan
Alan
03-22-2010, 04:53 PM
#4
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Do you have a aftermarket radio and amp? Sometimes the radio trigger for the amp will not supply enough juice to keep the amp on when turned up. If someone was lazy and didn't want to put a relay in to trigger the amp they may have wired the trigger hot all the time or jumped it at the amp so amp is always on
03-22-2010, 05:19 PM
#5
Drifting
Thread Starter
I do have an aftermarket radio and amp. The amp only powers on when the ignition is on. I'll check the amperage that's drawn, it might be a non-issue. The issue may very well be that my battery is dated April, 2004 for an 85 month battery. Might be time for a new battery. :-)
