Heater bypass wiring - which way is best?
#1
Heater bypass wiring - which way is best?
So, my heater blower motor in the engine bay is making the dreaded noise and it's time to add a bypass. In doing so, I still want heat... So I need to make some wiring changes. While searching I found two ways:
1. A homegrown method described as "definitive" as found here:
https://rennlist.com/forums/964-foru...-solution.html
OR:
2. Add a bridge relay (964.610.184.00) and then pull the fuse as described here:
https://rennlist.com/forums/993-foru...l#post10404484
Option 2 seems cleaner to me and I'd like use it... But will this retain my heater? Anyone done this?
Thanks,
Ryan
1. A homegrown method described as "definitive" as found here:
https://rennlist.com/forums/964-foru...-solution.html
OR:
2. Add a bridge relay (964.610.184.00) and then pull the fuse as described here:
https://rennlist.com/forums/993-foru...l#post10404484
Option 2 seems cleaner to me and I'd like use it... But will this retain my heater? Anyone done this?
Thanks,
Ryan
#3
Rennlist Member
#5
As far as I can remember the early model 964s (89 - 90, someone correct me if I'm wrong) don't have the easier wiring options the later models do. So, the jumper method won't work on the early 964s.
You would need to do the "definitive" method because you have a 90. I have an 89, and that method worked for me. The job is kinda a PITA because there's not a lot of room to work, even if it is just splicing a wire, I could barely get my hands in there. Long pliers would help.
If you have a later 964, why would you go through all that extra work if all you had to do was simply remove the relay and put in or jumper or better yet just plug in another relay?
You would need to do the "definitive" method because you have a 90. I have an 89, and that method worked for me. The job is kinda a PITA because there's not a lot of room to work, even if it is just splicing a wire, I could barely get my hands in there. Long pliers would help.
If you have a later 964, why would you go through all that extra work if all you had to do was simply remove the relay and put in or jumper or better yet just plug in another relay?
#6
As far as I can remember the early model 964s (89 - 90, someone correct me if I'm wrong) don't have the easier wiring options the later models do. So, the jumper method won't work on the early 964s.
You would need to do the "definitive" method because you have a 90. I have an 89, and that method worked for me. The job is kinda a PITA because there's not a lot of room to work, even if it is just splicing a wire, I could barely get my hands in there. Long pliers would help.
If you have a later 964, why would you go through all that extra work if all you had to do was simply remove the relay and put in or jumper or better yet just plug in another relay?
You would need to do the "definitive" method because you have a 90. I have an 89, and that method worked for me. The job is kinda a PITA because there's not a lot of room to work, even if it is just splicing a wire, I could barely get my hands in there. Long pliers would help.
If you have a later 964, why would you go through all that extra work if all you had to do was simply remove the relay and put in or jumper or better yet just plug in another relay?
#7
Technical Guru
Rennlist Member
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#8
#10
Rennlist Member
timely thread. I have a 91. I am putting in the heater blower bypass, removing my fan (not selling it!).
Is #1 the best option for my situation, which will allow me to keep heat functional?
Is #1 the best option for my situation, which will allow me to keep heat functional?
#11
Drifting
So, my heater blower motor in the engine bay is making the dreaded noise and it's time to add a bypass. In doing so, I still want heat... So I need to make some wiring changes. While searching I found two ways:
1. A homegrown method described as "definitive" as found here:
https://rennlist.com/forums/964-foru...-solution.html
OR:
2. Add a bridge relay (964.610.184.00) and then pull the fuse as described here:
https://rennlist.com/forums/993-foru...l#post10404484
Option 2 seems cleaner to me and I'd like use it... But will this retain my heater? Anyone done this?
1. A homegrown method described as "definitive" as found here:
https://rennlist.com/forums/964-foru...-solution.html
OR:
2. Add a bridge relay (964.610.184.00) and then pull the fuse as described here:
https://rennlist.com/forums/993-foru...l#post10404484
Option 2 seems cleaner to me and I'd like use it... But will this retain my heater? Anyone done this?
#13
#14
Actually here man:
https://rennlist.com/forums/964-foru...er-bypass.html
That guy has a 91 like yours.
Surprised no one else has posted on this. It's been awhile since I did mine.