signal from ecu to coolant level sen., st205, maybe it will do better to post it here Options

[urbandork]

ok so my st205 water pump is hooked up just as it is on the edw except since i didnt have a relay for it so i just ran the wires around the would be relay.

im drawing my power from the cds fuse just like it shows on the ewd and the ground is also ran just like it is on the ewd.

the other three wires from the pump hook up to the corisponing wires on the ea1 connector which feed back into the ecu just like it is on the ewd

the level sensor has been tested and found that it does
close and complete the cuircut

i checked continuity between the ecu and sensor plug and fount that im not getting a signal from the ecu to the sensor......

........ anyone know what kinda signal is sent out from the ecu to the sensor which goes from the sensor (if closed) and to the ground.

[lagos]

read this on how relays work
http://electronics.howstuffworks.com/relay.htm

you cant power something like an intercooler pump off of your ecu. it needs more power then the ecu was designed to handle, so youll just end up frying something. you want the pump to get its power right from the battery (with a fuse in line), and hook up the other part of the relay to the ecu, so that the ecu can trigger it on/off as it needs to.

This post has been edited by lagos: Dec 5, 2006 - 5:24 PM