ANSWERS: 1
  • Should be a rectangular metal device about 3/4X1X1-1/2 inches under your dash and witin 3 feet of your heater blower. Again. Auto manufacturers quit making wiring diagrams more than 30 years ago (detailed that is) All trouble shooting since done with an electrical analyzer and for about 20 years computer. One relay likely activates te heater blower. You should also have one that switches to the heater vent. And that one activating activates the blower relay. Now that first vent relay I mention. It is usually activated by engine vacuum.

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