# Ecm battery fuse? **URL:** \ **Category:** General Discussion\ **Created:** [June 27, 2022, 10:29pm UTC](https://community.cartalk.com/t/ecm-battery-fuse/184898 "2022-06-27T22:29:41Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\ **Post date:** [June 27, 2022, 10:29pm UTC](https://community.cartalk.com/t/ecm-battery-fuse/184898/1 "2022-06-27T22:29:41Z")
![image](https://global.discourse-cdn.com/cartalk/original/3X/0/4/043d2a51aea49cce3010e97684255b19027b5031.jpeg) My 07 torrent and 08 equinox have same Fuse box. 33 is ecm battery and 34 is Tcm battery. 35 is trailer light. 36 is wiper. The equinox did not have fuse 33 and 34. My torrent does. Any reason why 33 and 34 are not used on equinox? Both have same motor. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [June 27, 2022, 10:45pm UTC](https://community.cartalk.com/t/ecm-battery-fuse/184898/2 "2022-06-27T22:45:42Z")
No idea, but all the circuits have to be fused of course. So the ecm and tcm still has at least one fuse somewhere in the nox. How many individually fused circuits there are, which circuit has what fuse, it all depends on the wire gauge, length of wires, and the current draw requirements. Copper is getting to be quite expensive, 70 cents in 2000, nearly $5 now, so copper price is another motivating design goal in newer cars, perhaps less copper is used in one design vs the other. ---
**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\ **Post date:** [June 27, 2022, 10:51pm UTC](https://community.cartalk.com/t/ecm-battery-fuse/184898/3 "2022-06-27T22:51:50Z")
So, No fuse for ecm, battery (33) and car will run. 22 is pcm, ignition. 23 is transmission. That’s all manual says for 22 and 23. A fuse “in” means power. Why does it say, pcm, battery? Power is battery ---
**Author:** ![TheWonderful90s](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/thewonderful90s/32/29584_2.png) [@TheWonderful90s](https://community.cartalk.com/u/TheWonderful90s)\ **Post date:** [June 28, 2022, 2:46am UTC](https://community.cartalk.com/t/ecm-battery-fuse/184898/4 "2022-06-28T02:46:54Z")
Does battery mean that it is always hot, when the ignition is turned off? The other ECM may not need battery power to preserve its memory. ---
**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\ **Post date:** [June 28, 2022, 12:37pm UTC](https://community.cartalk.com/t/ecm-battery-fuse/184898/5 "2022-06-28T12:37:11Z")
I took out 36 by mistake to check brake light issue and put it in another slot. So wipers wouldn’t work. Nox does not have trailer kit so entire column had no fuses and torrent had 5? 33-37. 36 is wiper and it runs fine without it. I put it back. Torrent has trailer package. Lots of spare/unused fuse locations on this thing. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [June 28, 2022, 12:50pm UTC](https://community.cartalk.com/t/ecm-battery-fuse/184898/6 "2022-06-28T12:50:52Z")
> [@TheWonderful90s](#): > > Does battery mean that it is always hot, when the ignition is turned off? The other ECM may not need battery power to preserve its memory Yes, that is typical GM labeling. IGN is key-on 12V, BATT is always connected to the battery. Every ECM has a BATT connection as well as an IGN.