ViciousV15 Posted March 15 Report Share Posted March 15 Does anyone have the wiring diagram for the under dash of the base model truck handy? Currently troubleshooting my blower motor/motor relay and I'm not getting 12v. Would love to know what it runs back to before I go prying at stuff. Quote Link to comment
NC85ST Posted March 16 Report Share Posted March 16 Have you checked the fuse? Also, no prying necessary to get the blower motor out, three screws and it’s out. Quote Link to comment
datzenmike Posted March 16 Report Share Posted March 16 It's the #10 fuse (20 amp) over from the left. It's hot at all times the ignition is in on or accessory. The fan speed is controlled by selecting one of several choices of resistance to ground. Quote Link to comment
ViciousV15 Posted March 16 Author Report Share Posted March 16 1 hour ago, NC85ST said: Have you checked the fuse? Also, no prying necessary to get the blower motor out, three screws and it’s out. 1 hour ago, datzenmike said: It's the #10 fuse (20 amp) over from the left. It's hot at all times the ignition is in on or accessory. The fan speed is controlled by selecting one of several choices of resistance to ground. Yeah I've checked the fuse and it's still doing fuse things. I wonder if my connection to ground is bad. I'll keep you all updated. Quote Link to comment
ViciousV15 Posted March 16 Author Report Share Posted March 16 My understanding on how this worked was fuseblock>resistor>blower. Thus why I was looking for the wiring diagram. If that is how it functions, how does the motor control change what resistance is selected? I've got power on one wire on the 5 pin resistor connector that's blue/brn. It put out power on every speed except the lowest. Is something wrong with the selector? Quote Link to comment
Seven Two Oh No Posted March 16 Report Share Posted March 16 @ViciousV15 I've got a pdf of the '86 FSM, will DM you the link 1 Quote Link to comment
datzenmike Posted March 16 Report Share Posted March 16 19 hours ago, ViciousV15 said: Does anyone have the wiring diagram for the under dash of the base model truck handy? Currently troubleshooting my blower motor/motor relay and I'm not getting 12v. Would love to know what it runs back to before I go prying at stuff. Won't be ground if you're not getting 12v. When the ignition is turned on you should hear the heater relay click. The headlamp relay is above the fuse box on the far right or closest the fire wall. The heater relay is next to it on the left side. Quote Link to comment
ViciousV15 Posted March 16 Author Report Share Posted March 16 3 hours ago, datzenmike said: Won't be ground if you're not getting 12v. When the ignition is turned on you should hear the heater relay click. The headlamp relay is above the fuse box on the far right or closest the fire wall. The heater relay is next to it on the left side. Yeah no clicking. I think I'm gonna have to come at this with new parts/new used parts. I think it's kind of a long shot considering the state of this truck. Quote Link to comment
datzenmike Posted March 16 Report Share Posted March 16 Pull the heater relay and check for 12v on the Red wire. If the #10 fuse is ok it should be there. If there is 12v on the Red wire then the relay must be bad. The relay is an 1M # 25230-C9925 and BLUE color code. Used between '80 and '88 in the 720, 280zx, '81-'84Maxima, 310, Sentra, Pulsar NX, Stanza, Stanza Wagon. If you find one in a wrecking yard. Quote Link to comment
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