Supra Electrical system

tom917 · 11-24-2011, 02:08 PM

I have a 1986 supra.
for some reason my battery keeps running down, I feel that is may be my factory installed alarm system can anyone tell me how to turn it off?

Thank you

Tom

cre · 12-27-2011, 08:01 PM

You posted this in the wrong section... hence it went unseen. Thread moved to the MKIII section.

The factory installed security system is VERY low power. Unless something is significantly wrong with it or it is frequently triggered it is very unlikely to be the cause of the problem. Google how to test for "parasitic loss" with a multimeter and start pulling fuses one at a time until the draw is under a hundred milliamps (around 30 or 40mA is the recommended limit). If it already is then get the battery tested.

Poorly installed aftermarket components are the most common causes of excessive drain: Stereo, amplifier(s), radar detectors, accessories connected to the cigarette lighter (if the cig lighter has been rewired to stay powered when the ignition is off), hard wired radar detectors, etc.

11-24-2011, 02:08 PM	#1
tom917 Stock Join Date: Nov 2011 Location: New Jersey Posts: 4 Blog Entries: 1	Supra Electrical system I have a 1986 supra. for some reason my battery keeps running down, I feel that is may be my factory installed alarm system can anyone tell me how to turn it off? Thank you Tom

12-27-2011, 08:01 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	You posted this in the wrong section... hence it went unseen. Thread moved to the MKIII section. The factory installed security system is VERY low power. Unless something is significantly wrong with it or it is frequently triggered it is very unlikely to be the cause of the problem. Google how to test for "parasitic loss" with a multimeter and start pulling fuses one at a time until the draw is under a hundred milliamps (around 30 or 40mA is the recommended limit). If it already is then get the battery tested. Poorly installed aftermarket components are the most common causes of excessive drain: Stereo, amplifier(s), radar detectors, accessories connected to the cigarette lighter (if the cig lighter has been rewired to stay powered when the ignition is off), hard wired radar detectors, etc. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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