JinTN

hey guys im wondering if anybody can explain what i did wrong. i have an ls1 in a 69 c10. im using stock gauges. i bought an adapter and a sending unit from speedway to hook up stock my temp gauge. b4 i put it in i wanted to test it. i hooked the sending unit to the wire from the gauge and i grounded the sending unit to the block. i was gonna get a lighter and heat up the sending unit to make sure the gauge worked, but b4 i even got that far the sending unit exploded. lol it only took about 10 seconds. how did i screw this up? any help is appreciated

bczee

iTrader: (12)

Was the from the gague Positive or neg ?.... The Gauge should expect variable ground depending on the temp from the sender. If you gave the sensor Positive 12V..I could see what you found out as a result of the +12v to the sender.

BC

JinTN

it is only 1 wire. i didnt check to see if it was + or -. it just has a spade connector. i thought there was only 1 way to hook it up.

wildcamaro

iTrader: (15)

Sensors usually work off of grounds from the PCM...

JinTN

69 c10 with stock gauges. it doesnt do anything with the pcm.

NshoreFixR

That sensor is a ground sensor. Your gauge will be supplied with voltage key on and as the sensor heats up it changes the resistance of the ground. Hooking 12v to it was like touching jumper cables together, something had to pop.

NshoreFixR

You can test the sensor with a multi meter set to continuity. Test the continuity between the sensor body and the one spade at room temp. Now heat up a pan of water and set the sensor tip in it an watch the continuity change.

Pop N Wood

iTrader: (1)

Never heard of such a thing. I'd say the part was defective, see if you can exchange it.

ls1nova71

iTrader: (4)

My best guess would also be a defictive sender. Was it made in China?

SSellers

Something doesn't add up. Sounds like a defective part. A standard TS6 type sending unit reads over 300 ohms at 100 degrees. Even with 12V right on it it should not hurt it. Back at the gauge you have a coil so it will essentially delay current flow by producing EMF (which is the magnetism that moves the needle) so current will slowly start to flow at the sending unit until full V/R current. That's why it didn't blow immediately. If it blew i think I'd also be checking the instrumentation fuse. The other side of your gauge has 12V across a fixed resistor and coil at all times.

JinTN

i will keep messing with it and ill let u know what i figure ou