I've been having electrical issues with my '93 TA for about the last 5
years. I've replaced the battery about 4 times, the starter, and the
cables from the battery to the starter.
I do not drive this car very often, about 500 miles a year. When I let
the car sit, sometimes the battery is drained in one day. Other times
it will take a week. Once I charge the battery, the car runs fine.
If I charge the battery higher than the slow 2amp charge, the meter
drastically goes back and forth from fully charged to dead. When I say
drastically I mean about 2 times a second.
Recently problems have been getting worse. Now when I turn on the A/C,
the electric door locks continually lock and unlock. Now my keyless
entry remote no longer works.
Any idea's or suggestions on what to look for or where to start? I've
checked the few grounds that I could find and they seem fine.
You need to find out where the drains are occuring. My '95Z28 had a similar
drain problem where it would just last a week between runs even with a new
battery.That lasted just over 18 months and it turned out to be the
Alternator going freaky, it would happily supply the current load but only
around 200mA above that.
Get hold of clamp meter to check the cables, incl the cables from the Red
Connectcor.I also checked all the fuses to find the drains.
Checked drain on battery @ fusable links
single - 0.0
double - 0.0
double - 8.3
double - 86.6 mA
Checked all fuses for drain
Ign Off Ign ON in milliAmps
17 Radio 0.03 1.16
16 Crank 0.00 0.00
15 Windows 0.00 1.07
14 Wiper/Wash 0.01 1.13
13 IPDimmer 0.00 0.40 variable with position
12 Defog / Seats 0.00 lots
11 Horn / Cig 77.3 77.4 *** REMOVED FOR NOW
10 Tail 0.00 0.00
9 Gauges 0.00 0.00
8 Courtesy/Radio Lights 2.60 lots
7 Power Accy 0.00 0.00
6 Stop / Hazzard 0.00 0.00
5 PCM Ign 0.00 5000.00 Fuel Pump drops to 200mA
4 Radio Accy 0.00 0.00
3 HVAC 0.00 5000.00
2 Turns / Backup 0.00 0.00
1 AirBag 0.00 200.00
Fuse 11 drives the internal lights & presumably ALARM fitted by Prev Owner
The two double connections now drain about 8mA & 12mA which is good.
Car runs now with Alternator putting 9 - 10 Amps back into the system...
Checked TV & audio cables-
TV was draining 70mA so i removed inline fuse
FUSE 11 now drains only 6mA so car should be ok for battery drain
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.