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
Registered
 
85911's Avatar
 
Join Date: Apr 2013
Location: St. Louis, Missouri
Posts: 317
Garage
HVAC System

I am working on my heater system on my 85 911. All blowers have been either replaced or refurbished. I checked the fuses in the engine compartment and recorded the following:
#1. 16 amp fuse- blown
#2. 25 amp fuse- blown
#3. 16 amp fuse- good.

The Owner's Manual does not identify location and calls for the following:
Rear window defogger, rear window wiper return (which I don't have) 25 amp
Heater fan 25 amp
Relay for heater fan 5 amp

My Porsche manual states the following:
#1. Heater blower relay 16
#2. Heater blower 25
#3. Defogger, rear window wiper 25.

Attached is a picture with the bad fuses removed and the positions are 1 on the bottom, 3 on top.

I assume the Owner's Manual is wrong and that I should follow the Porsche manual.

I'm wondering if there was a 16 amp fuse in position #3 because I don't have a rear wiper.



__________________
1985 911 Carrera Targa, 2011 911 Carrera S 997.2, 1951 Harley Davidson Panhead Chopper, 1957 Harley Davidson Panhead- stock, 1972 Yamaha 250 DT-1(sold), 1959 Austin Healey (Bug Eye) Sprite- sold, 1959 Austin Healey (Bug Eye) Sprite- sold, 1960 Austin Healey (Bug Eye) Sprite- sold
Old 02-16-2015, 12:41 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered
 
wwest's Avatar
 
Join Date: Jul 2009
Location: Stunningly Beautiful Pacific NW.
Posts: 5,293
Garage
Some one has reverse wired your engine compartment fuse block?

Top to bottom for my '88 Carrera engine compartment fuse block.

1. Cabin heater control relay power.. Controls footwell blower power, provided cabin heater blower is pulling maximum current flow.

2. Cabin heater blower power, blower in engine compartment.

3. Rear window defrost grid power.


Footwell blowers stop if I remove #1

Cabin heat blower stop if I remove #2, as does footwell blowers, DUH!

Didn't test #3

Last edited by wwest; 02-16-2015 at 02:57 PM..
Old 02-16-2015, 02:41 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
Join Date: Oct 2010
Posts: 124
Garage
Check the Bentley. I believe different years were wired slightly differently.

Old 02-16-2015, 03:23 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Reply


 


All times are GMT -8. The time now is 03:04 PM.


 
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.