Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 911 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Wildman Emeritus
 
Join Date: Feb 2003
Location: Chitown Burbs
Posts: 1,878
A/C Electrical Help????

I need some electrical help for my A/C. It was running fine and just stopped while fan was on high.
Here's what I have done: ( I am basically an electrical idiot and must have worked for Lucas in a previous life)
Fuse- first thing checked.
Relay switched with known good relay
Fan Blower switch swapped for known good switch. Bentley pretty much points here
Verified voltage to fuse block
Verified continuity in resistors in footwell
No blower motor function still and I do not believe the clutch is engaging.

Still no go. So:
How do I jump the blower motor to verify it is functional or meter check it?
How do I verify there is power to the switch - which terminals do I check? I assume that if the switch has power the problem is between the switch and blower

And where else and how else to check the system? Bentley is not exactly definitive for troubleshooting the system electrically.

Like to have it functional before IMSA at Road America in 2 weeks and just be able to drive it comfortably.

__________________
Mike Andrew
1980 SCWDP
2024 Suby Forester
2018 BMW X1- Wife's
2000 Boxter - Sold
Old 07-21-2019, 10:51 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered
 
86 911 Targa's Avatar
 
Join Date: Jun 2009
Location: Manhattan Beach, California. Factory Delivery-Original owner-Retired engineer
Posts: 5,238

^^^^^

This will shut down you A/C.

Did you check both sides of the fuse?

pm me as needed.

Best,

Gerry
__________________
1986 911 Targa.
Per Road and Track magazine:
Only in L.A.:
In the window of a bar in Hermosa Beach, California.
"Happy Hour prices during all car chases."
Old 07-21-2019, 11:06 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Wildman Emeritus
 
Join Date: Feb 2003
Location: Chitown Burbs
Posts: 1,878
Have continuity thru fuse and holders so I assume the fuse is good.
__________________
Mike Andrew
1980 SCWDP
2024 Suby Forester
2018 BMW X1- Wife's
2000 Boxter - Sold
Old 07-21-2019, 11:44 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Wildman Emeritus
 
Join Date: Feb 2003
Location: Chitown Burbs
Posts: 1,878
Bump.
__________________
Mike Andrew
1980 SCWDP
2024 Suby Forester
2018 BMW X1- Wife's
2000 Boxter - Sold
Old 07-22-2019, 04:33 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered
 
Join Date: Mar 2015
Location: Central California (Sequoia Region PCA)
Posts: 82
Garage
Did someone add an evaporator relay and fuse?



PS: Photo stolen from 86 911 Targa
Old 07-22-2019, 05:46 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered
 
86 911 Targa's Avatar
 
Join Date: Jun 2009
Location: Manhattan Beach, California. Factory Delivery-Original owner-Retired engineer
Posts: 5,238
fuse.

Quote:
Originally Posted by Mike Andrew View Post
Have continuity thru fuse and holders so I assume the fuse is good.
Do you have 12v on both sides of the fuse
when the A/C is active?

Gerry

pm me as needed.
__________________
1986 911 Targa.
Per Road and Track magazine:
Only in L.A.:
In the window of a bar in Hermosa Beach, California.
"Happy Hour prices during all car chases."
Old 07-22-2019, 06:44 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Wildman Emeritus
 
Join Date: Feb 2003
Location: Chitown Burbs
Posts: 1,878
SOLVED!!!!!!!
Thanks to Raw911 and the rest of you for your assistance.
It was the evaporator fuse which I replaced and Voila!!!!
As I was doing it, I remembered replacing it long ago and how tight it was to get the fuse in with my giant hand in there with the correct angle for fuse placement.
Man, I feel like an even bigger electrical idiot now. However, I aspire to be an electrical moron in the future
Cleaned out a big mouse nest from the Smuggler's Box which could possibly have impeded airflow and led to high current draw. We shall see as I use the system. Man, I hate freaking mice. I fight them at my place in N. Wisconsin and now, here. Not enough owls, hawks and wolves.

__________________
Mike Andrew
1980 SCWDP
2024 Suby Forester
2018 BMW X1- Wife's
2000 Boxter - Sold
Old 07-22-2019, 07:00 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Reply


 


All times are GMT -8. The time now is 03:08 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.