Shorts

oh fer cryin' out loud people...

That thingy is a battery temp sensor per Battery System 8F-38 pg 1603 of the SERVICE MANUAL 2006 RAM TRUCK INCLUDES SRT-10 AND DIESEL (2005)

Then we jump to Charging 8F-45 Sensor - Battery Temperature(pg 1610)

DESCRIPTION
The Battery Temperature Sensor (BTS) is attached to the battery tray located under the battery.
OPERATION
The BTS is used to determine the battery temperature and control battery charging rate. This temperature data,
along with data from monitored line voltage, is used by the PCM (ECM Diesel) to vary the battery charging rate.
System voltage will be higher at colder temperatures and is gradually reduced at warmer temperatures.
The PCM sends 5 volts to the sensor and is grounded through the sensor return line. As temperature increases,
resistance in the sensor decreases and the detection voltage at the PCM increases.
The BTS is also used for OBD II diagnostics. Certain faults and OBD II monitors are either enabled or disabled,
depending upon BTS input (for example, disable purge and enable Leak Detection Pump (LDP) and O2 sensor
heater tests). Most OBD II monitors are disabled below 20°F.
REMOVAL
The battery temperature sensor (1) is located under
the vehicle battery and is attached (snapped into) a
mounting hole on battery tray (4).
1. Remove battery. Refer to 8, Battery for procedures.
2. Pry sensor (1) straight up from battery tray mounting
hole to gain access to electrical connector (3).
3. Disconnect sensor from engine wire harness electrical
connector.
INSTALLATION
NOTE: The battery temperature sensor (1) is located under the vehicle battery and is attached (snapped
into) a mounting hole on battery tray (4).

(pg 1611)8F-46
1. Pull electrical connector (3) up through mounting
hole in top of battery tray.
2. Connect sensor.
3. Snap sensor into battery tray.
4. Install battery. Refer to 8, Battery for procedures.


Is everybody happy now? Sheesh, I'm trying to enjoy the beginning hours of my weekend..handled enough babysitting on the weekend..gah!

Beer me.

PWong

I can press it with my thumb and it would tell my thumb temp too.

Shorts

only if you complete the circuit and touch the pside negative terminal with your other thumb

PWong

I can complete the circuit without touching terminals.
Go get your beer.

Shorts

Oooh!

realfast

Who would have ever thought a question would cause such a stir!! I will think before I ask a question again. Drama drama brings to mind the the question where do you put crabs ? In a barrel!! good bye.

Shorts

cumalong2

does a AGM battery(optima) operate at the same tempature as a lead acid battery?

Jeff in TD

I think so.

Humblecowboy

I came here and did a search for what that thingy was. I've only had my old truck 17 years and already just yesterday noticed it when I was changing my batteries for the 4th or 5th time. Shoot, ya gotta get up early in the morning to keep me from noticing stuff about my truck. I like the 'battery presence' purpose myself. It makes sense too because if there is no battery the idiot light in the cluster will tell you. Right? Seriously, thanks to the guys here who know.

shep1

it helps unload the battery weight off the suspension!