whats up honda-tech im doing a 0bd1 b16 swap in my 1991 crx im using a ob0 engine harness. my problem on the obd0 harness the plug for the water temp is differnt then the water temp senser. im going to wire in the right plug but im not sure witch wires are on what side of the senser. the color of the wires are yellow with a green strip, and black. thank you

 

your doing something wrong the plugs are all the same for the temp sensor and the temp guage sensor. the only plug that is different witch is probably what your talking about is the fan switch. you gota extend those wires to reach the thermostat housing if you got a obd1 motor. and it doesnt matter witch wire goes to witch wire it will work either way.

 

if you wire them backwards the fan will spin backwards.

Im going to assume as in most things electrical, black is negative, the colored wire is positive.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 19992civichatch &raquo;</TD></TR><TR><TD CLASS="quote">whats up honda-tech im doing a 0bd1 b16 swap in my 1991 crx im using a ob0 engine harness. my problem on the obd0 harness the plug for the water temp is differnt then the water temp senser. im going to wire in the right plug but im not sure witch wires are on what side of the senser. the color of the wires are yellow with a green strip, and black. thank you</TD></TR></TABLE>the connector you are talking about is the cooling fan switch - it doesn't matter which wire is where - it is just a switch in the negative ground wire - when coolant temp is cold the switch is open and the ground is open - when coolant gets up to operating temperature, the switch closes completing the ground circuit causing the fan to run


Modified by jlicrx at 10:51 AM 6/17/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by black0hatch &raquo;</TD></TR><TR><TD CLASS="quote"> the plugs are all the same for the temp sensor and the temp guage sensor. </TD></TR></TABLE>not quite - the temp sensor for the ECU has a 2-wire connector - the sensor for the gauge has a 1-wire connector

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bobjohnson &raquo;</TD></TR><TR><TD CLASS="quote">if you wire them backwards the fan will spin backwards.

Im going to assume as in most things electrical, black is negative, the colored wire is positive.</TD></TR></TABLE>
thats not true at all you dont know what your talking about.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">not quite - the temp sensor for the ECU has a 2-wire connector - the sensor for the gauge has a 1-wire connector</TD></TR></TABLE>
i meant the plugs between the engine harness and the motor.

 

its the fan switch and it will only work 1 way so it doesnt matter which way u wire it coz if it dont work the one way must work the other

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by black0hatch &raquo;</TD></TR><TR><TD CLASS="quote">i meant the plugs between the engine harness and the motor.</TD></TR></TABLE>

 

i was takin about the 2 wire plug on the obd0 harness thats in back of the motor to a 0bd1 water neck houseing is that right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 19992civichatch &raquo;</TD></TR><TR><TD CLASS="quote">i was takin about the 2 wire plug on the obd0 harness thats in back of the motor to a 0bd1 water neck houseing is that right?</TD></TR></TABLE>that is right - the cooling fan switch is on the back of the block on the OBD0 engines and on the thermostat housing on the OBD1 engine - yellow/green and black wires - doesn't matter which wire goes where as it is just a switch to ground

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">that is right - the cooling fan switch is on the back of the block on the OBD0 engines and on the thermostat housing on the OBD1 engine - yellow/green and black wires - doesn't matter which wire goes where as it is just a switch to ground

</TD></TR></TABLE>

correct.

 

Why dont you just switch out the Coolant Fan Switch from a two prong to a single prong fan switch? btw, would any of you know what size socket used to remove the double prong fan switch?