Quote:
Originally Posted by Houston Ben
I have to did up an old thread, I finally got around to getting my third relay and wired them up like so
Engine temp got to 231 to turn on fan and turned off at 193. Problem is, I thought they would both turn on but just the small one turned on. Looking at the diagram can anyone tell me why only one turned on??
Thanks for any and all suggestions.
Ben |
If relay 1 does not operate (because of bad wiring, missing control signal, faulty relay, etc.):
1) Neither fan will run when you reach the low speed fan temp
2) The fan on the left in the diagram will come on at full speed when you reach your high speed fan temp.
If relay 2 does not operate:
1) Fan 1 and 2 will run at half speed when you reach low speed fan temp
2) The fan on the right in the diagram will run at full speed when you reach high speed fan temp and the fan on the left will be off.
If relay 3 does not operate:
1) Fan 1 and 2 will run at half speed when you reach low speed fan temp.
2) The fan on the left in the diagram will run at full speed when you reach high speed fan temp and the fan on the right will be off.
Since you're not getting both fans on at half speed and then getting just one fan on at 231, it sound like you have wiring/relay problem with relay #1 in the diagram.