.12 amp power draw on room fuse, slowly killing battery - anyone seen this?
#1
RX-7 Bad Ass
Thread Starter
iTrader: (55)
.12 amp power draw on room fuse, slowly killing battery - anyone seen this?
Hey guys -
Buddy of mine has a 93 Touring with a slow power draw. We've done some troubleshooting trying to find the source of the problem and are coming up empty.
With a meter between the negative terminal and negative battery post we're seeing .12 amps with everything closed and off, security system not armed. My car sees about .00 or .01 amps in the same situation.
Pulling the ROOM fuse by the clutch pedal kills the power draw.
We've tried unplugging the usual suspects - unplugging all aftermarket electronics, which is just gauges and stereo. Still have something pulling down a draw.
Has anyone else run into this and know of any common culprits to test?
Dale
Buddy of mine has a 93 Touring with a slow power draw. We've done some troubleshooting trying to find the source of the problem and are coming up empty.
With a meter between the negative terminal and negative battery post we're seeing .12 amps with everything closed and off, security system not armed. My car sees about .00 or .01 amps in the same situation.
Pulling the ROOM fuse by the clutch pedal kills the power draw.
We've tried unplugging the usual suspects - unplugging all aftermarket electronics, which is just gauges and stereo. Still have something pulling down a draw.
Has anyone else run into this and know of any common culprits to test?
Dale
#4
Rotary Freak
iTrader: (24)
My suggestion:
Have your doors all opened but LOCKED.
Truck popped but LOCKED.
Glove box opened but have a tap over the switch so it is on OFF position.
And then with the amp meter on, start pulling bulbs and see which will will affect your parasitic draw.
Maybe have the alarm system by-passed so it wouldnt sound when you moved the car accidentally and cause a high amp draw which can in term blow the fuse in the amp meter.
-AzEKnightz
Have your doors all opened but LOCKED.
Truck popped but LOCKED.
Glove box opened but have a tap over the switch so it is on OFF position.
And then with the amp meter on, start pulling bulbs and see which will will affect your parasitic draw.
Maybe have the alarm system by-passed so it wouldnt sound when you moved the car accidentally and cause a high amp draw which can in term blow the fuse in the amp meter.
-AzEKnightz
#5
RX-7 Bad Ass
Thread Starter
iTrader: (55)
Thanks for the suggestions! I'm still baffled as to what circuit is doing a slow power drain. The weird thing too is sometimes you'll hook up the meter and see the .12 amp draw, sometimes you'll hook it up and see .00. Or, you'll have the .12 amp draw, pull the room fuse, put it back, and it will stay at .00. It's just damn flaky.
Keep the ideas coming!
If all else fails, we're talking about installing a relay on the room fuse circuit that only opens when you key on. It's a workaround but will solve the problem.
Dale
Keep the ideas coming!
If all else fails, we're talking about installing a relay on the room fuse circuit that only opens when you key on. It's a workaround but will solve the problem.
Dale
#6
yeah, Ive got the same problem on my 02 for the last 5 years. Ok, I admit I havent tried to trace it. I ended up buying a 3 stage trickle charger, which I plug in if im not going to use the car for a couple of weeks.
#7
Rotary Freak
iTrader: (24)
Thanks for the suggestions! I'm still baffled as to what circuit is doing a slow power drain. The weird thing too is sometimes you'll hook up the meter and see the .12 amp draw, sometimes you'll hook it up and see .00. Or, you'll have the .12 amp draw, pull the room fuse, put it back, and it will stay at .00. It's just damn flaky.
Keep the ideas coming!
If all else fails, we're talking about installing a relay on the room fuse circuit that only opens when you key on. It's a workaround but will solve the problem.
Dale
Keep the ideas coming!
If all else fails, we're talking about installing a relay on the room fuse circuit that only opens when you key on. It's a workaround but will solve the problem.
Dale
Whenever you pull the fuse out, you already disrupted the circuit and causes the "culprit" from any draws. But once you wait long enough with the fuse back in, it will start drawing again.
If all falls through, adding a relay is not a bad idea at all. That'll definitely fixes this current drawing problem.
Let us know if you find out what the problem is. (Many of the car's that I've fixed that's drawing current is from the DOME light 'map lights') So I would start with that.
-AzEKnightz
Trending Topics
#11
~17 MPG
iTrader: (2)
There is a small bulb that illuminates the ignition switch (it's behind an orange lens on the steering column hood), it should be lit whenever either of the doors is open. If I remember correctly, it will draw about 0.1A current. Try closing the doors (or activating the door switches as if the doors were closed); the drain should stop when the lamp turns off.
#12
RX-7 Bad Ass
Thread Starter
iTrader: (55)
Good suggestions! We'll go through and pull some bulbs and see if that helps.
Hopefully tomorrow we'll be putting the turbos back in the car, once it's running again we'll get on the current draw.
Thanks, I'll keep you posted.
Keep the suggestions coming!
Dale
Hopefully tomorrow we'll be putting the turbos back in the car, once it's running again we'll get on the current draw.
Thanks, I'll keep you posted.
Keep the suggestions coming!
Dale
#15
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,805
Received 2,577 Likes
on
1,831 Posts
radio maybe? the clock, radio station memory is on the room circuit too
#17
power = v*I
watts = 12vdc*.12
1.44 watts which equals the door key and combination switch bulb. check to see if they are on. the bulbs can fall off the light rings, be on inside the door but not light the illumination ring
watts = 12vdc*.12
1.44 watts which equals the door key and combination switch bulb. check to see if they are on. the bulbs can fall off the light rings, be on inside the door but not light the illumination ring
#23
Chocobutt
iTrader: (25)
Looool I converted a majority of the halogen bulbs to leds (still having problem, but I don't drive the car much and I have a circuit breaker installed to unplug the battery)
The only one I didn't switch out where the indicator lights like check engine etc, I tried swapping it to all leds, but then some would be on 100% of the time, or never turn back on again...
The only thing I can think of is there is always a small draw, but by switching to leds (very low resistance) from halogen bulbs, the drain is more pronounced.
The only one I didn't switch out where the indicator lights like check engine etc, I tried swapping it to all leds, but then some would be on 100% of the time, or never turn back on again...
The only thing I can think of is there is always a small draw, but by switching to leds (very low resistance) from halogen bulbs, the drain is more pronounced.