Taco(ma)
not told engine runs car drives
not told blower dead on high.
we can not see your hands blinded in text box;.
is the blower dead on high
are the controls , climate controls or the old skool(sic) manual.
hands
under hood fuse box , 5oamp yes it is that.
under dash fuse box
or fiddling about on blower box side at the RESISTOR block.
yes fuses are tight for good reason,s.
that 50amp fuse in the schematic is marked in strange way.
a fuseable link maybe.
there is no reason to pull it first.
use a voltmeter, to both ends, 1 at a time and black lead of meter to NEG lug of battery both sides 12vdc is good fuse. heater turned on.
the heater relay dead, will make my test fails, due to leakage currents. and dead relay .
key off, battery neg lug pulled
measure ohms of fuse , directly must be 0 ohms.
what is wise if all is use the meter on the relay heater
measure volts on all pins of it , x4
the test is
Igntion must be on for heater relay to energize. and blower on., full
here is the relay tests.
super simple 1st test.
pin 5 ,= 12vdc , if not 5amp blown.
pin3 , 12vdc or relay is off line or bad.
pin1, 12vdc or ign1 fuse blown/
pin2, 0vdc if not the controller is malf''ing control switch not grounding this point
if all that passes the blower resistor block is bad, and super common.
but on high blower works ok? as high bypass the block.
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