Blower motor
Thread Starter
Administrator
Joined: Nov 2004
Posts: 4,084
Likes: 235
From: Southern California
Checking this wiring diagram I do not see any reason this would not work on a Non-A/C truck.
The relay circuit is connected to the Hi speed terminal of the blower switch that should be common to both A/C and Non-A/C trucks.
The only difference would be in the A/C & Heater vacuum switch which on a Non-A/C truck would not have the MAX and MAX A/C settings.
If there is some reason you think it would not work let me know and I can recheck it.
Jim
The relay circuit is connected to the Hi speed terminal of the blower switch that should be common to both A/C and Non-A/C trucks.
The only difference would be in the A/C & Heater vacuum switch which on a Non-A/C truck would not have the MAX and MAX A/C settings.
If there is some reason you think it would not work let me know and I can recheck it.
Jim
Registered User
Joined: Nov 2010
Posts: 2,205
Likes: 9
From: Lloydminster SK/AB
Next question, could you just use one relay and have it just upstream of the blower switch. This would give full batt. voltage to the blower switch and give all blower modes a boost instead of just high?
The blower switch may still cause a small voltage drop but i think it would be minimal.
Thoughts?
The blower switch may still cause a small voltage drop but i think it would be minimal.
Thoughts?
Registered User
Joined: Dec 2002
Posts: 330
Likes: 8
From: DFW, TX
It's a good idea to keep the high amperage loads off the switch. If you increase the amperage through the switch it could overheat.
Do the little bit of extra work so you don't burn your truck down.
Do the little bit of extra work so you don't burn your truck down.
Thread Starter
Administrator
Joined: Nov 2004
Posts: 4,084
Likes: 235
From: Southern California
Hey sorry didn't see you hanging there.
Term #87 from K-2 connects to the (+) 12ga Dk-Green lead of the blower motor out under the hood.
Under the hood, look at the blower motor cover and the follow down about 6 inches and you will find a 2-blade connector, this connects the motor to the harness, be sure to connect your lead from Term. #87 to the Dark Green wire on the motor side of the connector preferably.
If you were to connect to the 12ga Black wire it would be a dead short
At this time you need to also upgrade your motor ground wire on the motor side of the connector to get the full benefits of this upgrade.
Term. #30 connects to your Battery (+) I used a 60-amp fuse, be sure to route this wire carefully as it can cause great damage if it shorts to ground.
When connecting my blower to the heavy gauge wire I used bronze split-bolts to make the connection and then insulated them well.
Like these at Home Depot.
http://www.homedepot.com/webapp/wcs/...atalogId=10053
K-2 relay, I would strongly recommend using a 75-amp Power relay here because the 30-amp can get quite hot during operation.
^^^^^^
Jim
Term #87 from K-2 connects to the (+) 12ga Dk-Green lead of the blower motor out under the hood.
Under the hood, look at the blower motor cover and the follow down about 6 inches and you will find a 2-blade connector, this connects the motor to the harness, be sure to connect your lead from Term. #87 to the Dark Green wire on the motor side of the connector preferably.
If you were to connect to the 12ga Black wire it would be a dead short
At this time you need to also upgrade your motor ground wire on the motor side of the connector to get the full benefits of this upgrade.
Term. #30 connects to your Battery (+) I used a 60-amp fuse, be sure to route this wire carefully as it can cause great damage if it shorts to ground.
When connecting my blower to the heavy gauge wire I used bronze split-bolts to make the connection and then insulated them well.
Like these at Home Depot.
http://www.homedepot.com/webapp/wcs/...atalogId=10053
K-2 relay, I would strongly recommend using a 75-amp Power relay here because the 30-amp can get quite hot during operation.
^^^^^^
Jim
Registered User
Joined: Feb 2007
Posts: 238
Likes: 0
From: California
thanks Jim, I have tried looking all over for the two pin connector under the hood and can't find it for the life of me! also I will have to change to a 75amp relay in the coming days, as I'm going out of town for work and the 40amp relay is in place
Registered User
Joined: May 2004
Posts: 429
Likes: 0
From: Lingleville TX but active duty Air Force all over the world currently
I wanan do this but Im confused. I see in the diagram you have 2 relays but in your pic you mounted 3 on the piece of plexiglass..
What is the 3rd relay for and where does it come into play?
What did you do with the burnt brown wire from the fuse box in the beginning?
I am electronic stupid until i do soemthing myself. I apologize for all the questions.
What is the 3rd relay for and where does it come into play?
What did you do with the burnt brown wire from the fuse box in the beginning?
I am electronic stupid until i do soemthing myself. I apologize for all the questions.
Thread Starter
Administrator
Joined: Nov 2004
Posts: 4,084
Likes: 235
From: Southern California
Thread Starter
Administrator
Joined: Nov 2004
Posts: 4,084
Likes: 235
From: Southern California
I wanan do this but Im confused. I see in the diagram you have 2 relays but in your pic you mounted 3 on the piece of plexiglass..
What is the 3rd relay for and where does it come into play?
Only 2 relays are used in the blower motor modification, the 3rd one is for my Cycling Switch Delete.
What did you do with the burnt brown wire from the fuse box in the beginning?
I spliced the burnt wire to get it out of the fuse panel where it was then fused and connected to my power relay that controls all of the ignition circuits of the fuse panel.
I am electronic stupid until i do something myself. I apologize for all the questions.
What is the 3rd relay for and where does it come into play?
Only 2 relays are used in the blower motor modification, the 3rd one is for my Cycling Switch Delete.
What did you do with the burnt brown wire from the fuse box in the beginning?
I spliced the burnt wire to get it out of the fuse panel where it was then fused and connected to my power relay that controls all of the ignition circuits of the fuse panel.
I am electronic stupid until i do something myself. I apologize for all the questions.
Jim
Registered User
Joined: Feb 2005
Posts: 109
Likes: 4
From: Houston
Thanks Jim for all the work you put into this to help out others. I have been wondering for a long time how in the world to get more power out of that fan and came across this today!
I am eager to put it together since I am starting tomorrow to install a whole new interior.
The one thing I don't yet understand since I am not too familiar with electronics, is the 3rd relay already there somewhere? You have 2 on the parts list and 3 on the mounting board. Where did the 3rd come from? I guess the one all the way to the left.... Sorry for my confusion! It looks very complicated to me (like I said I don't mess with electronics much) but hopefully by going through your diagram over and over, I will figure it out!
I am eager to put it together since I am starting tomorrow to install a whole new interior.
The one thing I don't yet understand since I am not too familiar with electronics, is the 3rd relay already there somewhere? You have 2 on the parts list and 3 on the mounting board. Where did the 3rd come from? I guess the one all the way to the left.... Sorry for my confusion! It looks very complicated to me (like I said I don't mess with electronics much) but hopefully by going through your diagram over and over, I will figure it out!