battery dying
#1
Pit Crew
Thread Starter
battery dying
I have an 93 SC400 and I dont drive it but about once a week as I drive a company truck. If I dont drive it in 2-3 weeks, the battery is week enough to not start the car. From receipts, the battery is less than 2 years old, its a Car Quest brand battery. Question: can I install a master disconnect and just "disconnect" the battery while its sleeping? Or will that mess with the PCM? Clock and radio are no big deal. I can jump it and itll start just fine after that but sometimes its a while that I drive it.
#2
Lead Lap
iTrader: (8)
Other than disabling the alarm, I can't think of any ill effect of disconnecting the battery. The ECU will reset each time you reconnect it, but it seems to re-learn pretty quickly.
Although, kill switches sometimes create funky ignition issues, so wiring in a quick disconnect could present similar problems.
Although, kill switches sometimes create funky ignition issues, so wiring in a quick disconnect could present similar problems.
#4
Moderator
I used to keep trip odo to keep track of oil change ,,, unfortunately that gets reset when battery is disconnected.
I would suggest getting a battery tender [< $6.00 with coupon at Harborfreight]
Salim
I would suggest getting a battery tender [< $6.00 with coupon at Harborfreight]
Salim
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#8
Many cars can drain a perfectly fine battery in a couple weeks of not being driven. Such is the state of technology with keyless entry; you have to power the receiver somehow.
If it's a pain to keep a tender on it you could also go the solar route. You'd have to wire in a (fused) lead that keeps battery power when the car is off, preferably with a quick-disconnect of some kind. A fairly-small solar array sitting on your dash might be just enough to keep the battery happy.
There's a good chance that a 5 watt would be fine, depending on how much of a draw you have. 5 watts is pretty cheap, 7.5W is not much more. Being in California I would imagine that your sun-cover is less of a concern than some of the more Northern states.
If it's a pain to keep a tender on it you could also go the solar route. You'd have to wire in a (fused) lead that keeps battery power when the car is off, preferably with a quick-disconnect of some kind. A fairly-small solar array sitting on your dash might be just enough to keep the battery happy.
There's a good chance that a 5 watt would be fine, depending on how much of a draw you have. 5 watts is pretty cheap, 7.5W is not much more. Being in California I would imagine that your sun-cover is less of a concern than some of the more Northern states.
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