Jetour Ice Cream Battery Drains Overnight: Tracking Down the Parasitic Draw

First, a Quick Reality Check

Your Jetour Ice Cream is an electric car, so the battery going flat is almost certainly the 12V auxiliary battery under the bonnet — the small lead-acid battery that wakes the computers, closes the high-voltage contactors and lets the car switch into Ready. It gets topped up by the DC-DC converter while the car is running, but once you park and lock it, nothing should be drawing from it. If it is dead every morning, something is staying awake and sipping current all night — that is what we call a parasitic draw.

The Usual Suspects — Check These First

In my experience with these little EVs, it is nearly always one of a handful of things:

• Aftermarket accessories: dash cams, GPS trackers, alarm add-ons, or a phone charger left in the 12V socket. These are wired hot and never sleep.
• A module that will not go to sleep: the body control module (BCM), the telematics/TCU unit, the infotainment head unit, or the charge-port controller. A stuck module can pull 200–500 mA all night.
• A light that never turns off: boot light, glovebox light, vanity mirror light, or a boot latch that is not quite engaging the switch.
• A tired 12V battery: an old or sulfated battery self-discharges and gives up fast, even with a normal draw. Test it before chasing ghosts.
• A sticky door, bonnet or tailgate switch: the car thinks a door is open, so it never enters sleep mode.

How to Test It Properly

Lock the car, pocket the key (keep it well away — at least 10 metres — so the keyless receiver stops polling), and let everything go to sleep for 30 to 60 minutes. Then connect a multimeter or clamp meter in series on the negative battery terminal and read the current. A healthy Ice Cream should settle below 50 mA (0.05 A); many sit around 20–30 mA. If you are reading 0.2 A or more, start pulling fuses one at a time and watch the meter — when the number drops, you have found the circuit. From there it is a matter of tracing the wiring and unplugging modules on that circuit until the draw disappears.

Can You Keep Driving It?

Short answer: yes, but do not ignore it. A flat battery will eventually strand you, and repeated deep discharges kill the 12V battery and can stop the high-voltage contactors from closing, which means the car will not go into Ready at all. Jump-starting with a proper jump pack is fine — just connect positive to positive, negative to a chassis ground, never to the battery negative post. Get the draw traced within a week or two. If you ever smell hot wiring or see smoke, stop driving immediately and have the car seen by an auto electrician.

This material is AI-generated and for informational purposes only — it does not replace an in-person diagnosis by a qualified mechanic.