[walk0080]

My car has recently been experiencing what I think is a parasitic battery power drain. In a span of just 24 hours, the battery voltage dropped to below 10V meaning I had to get a boost to start the car again. This happened to me twice since I didn't have time to think about troubleshooting.

I thought maybe the new battery was bust and self-discharging, so I disconnected the battery terminals and left the car overnight. I found the battery voltage dropped maybe 0.1V after 24 hours. To me that suggests the battery is probably ok - but I will try this week to bring the battery in for a test.

I also put a multi-meter in series between the battery and positive terminal (with engine off, accessories off, lights off) and I found there was a 210mAh of current draw. This current draw seems excessive to me.

I pulled fuses and found that the circuit for fuse # 36 (Central Timer, Electronic Modules) was accounting for 150mAh of current draw.

I ran out of time and did not pull any fuses or relays in the engine bay, or the relays in the interior cabin. I'll have to figure out what is causing the remaining 60mAh of current draw. I would guess the ECU and radio, which is ok.

Has anybody heard of a Central Timer Module/CTM pulling excessive current, or maybe there is something else I can check? Is there anything else on fuse #36 that could be busted causing the battery to drain?

By the way, the turn signals, rear wiper, interior lights, etc all work fine which suggests that the CTM is working ok.

Here are details on the battery:
MotorMaster GR40R/72 Battery (590 cold cranking amps)
Fully charged, engine off: ~12.5V
Engine on: ~14.5V
Age: About 2 months old


Any suggestions??? I really appreciate any help you have to offer.