im running a obd1 p72 with my old sohc harness. so i tested for power at my relay and im good on one side and on the other i have no power so my fan dont turn on or clutch dosnt swith on. i changed them out with my popps that are working and still nothin so what else should i try helpp

 

i checked my ecu and i get no power to b5-acs a/c switch,a/c input,~5v with koer & a/c off;

 

is there pressure in the system?

if there is no pressure or too much pressure the clutch wont engage

 

Each relay (clutch and fan) receives power at two terminals and outputs power at the other two. Do BOTH power terminals have battery voltage?

 

yes

 

Does the wire at ECU A15 have battery voltage with the key in ON(II)?

Have you tested the A/C thermostat in the evaporator?

If you ground the Blu/Red wire running between the A/C thermostat and heater control panel, does the fan turn on and the clutch engage?