78 Caprice wiring - Chevy Impala Forums

It appears you have not yet registered with our community. To register please click here...

Chevy Impala Forums

Go Back   Chevy Impala Forums > Vehicle-Specific B-Body Discussion > Chevy Caprice

Chevy Caprice General and Technical discussion for the Chevy Caprice (1965-1996), which shares the B-Body platform with the Chevy Impala.

Reply
 
LinkBack Thread Tools Display Modes
Old 08-22-2012, 07:58 PM   #1 (permalink)
Junior Member
 
78 Caprice in Oz's Avatar
 
Join Date: Aug 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
78 Caprice wiring

Hi, have some wiring issues with 78 Caprice, main problem is tracing wires from one end to the other through the loom, eg: internal lights work from headlight control but not from door jam switches , a circuit diagram would be a big help, if someone has one for this car.

78 Caprice in Oz is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-29-2012, 06:23 AM   #2 (permalink)
Junior Member
 
78 Caprice in Oz's Avatar
 
Join Date: Aug 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Have managed to fix my internal lighting problem, my next problems to fix are: Heater only blows cold air, does any one have any ideas as to what could be going on, or how the heater system works as it's a combination of electrical and vacuum, which is something i haven't seen before.

Second problem is the washers run all the time that the wipers are running, the pump isn't the usual 12v pump in the reservoir but instead a mechinal one attached to the wiper motor with a ratchet and with 5 wires plugged into it???? Any help will be appreciated.

78 Caprice in Oz is offline   Reply With Quote Quick reply to this message
Old 08-29-2012, 03:18 PM   #3 (permalink)
1st Year of the 5th Generation

 
77Impala's Avatar
 
Join Date: Nov 2007
Location: North TX
Posts: 6,615
Thanks: 270
Thanked 247 Times in 156 Posts
Glad you fixed the dome light problem.

Heater blowing only cold air is most likely the heater core plugged up which you can change out under the hood. Least likely problem may be that the temperature control cable is not connected to the blend door. You will find the blend door behind the glove compartment and it should have the cable attached to it.

Wiper washer problem will require a new washer unit which bolts up to the wiper motor. I have changed a few of them out on my car. They last about 1 to 2 years before going bad again.

__________________

1977 Chevrolet Impala Sedan, 305, TH200, 2.56:1, 106K miles, 37 Lifetime Warranty Parts.
1989 GMC C1500 Sierra ECSB 350, HM290, 3.08:1, 329K miles, 6 Lifetime Warranty Parts.

77Impala is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply


Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevy Impala Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Caprice rear lights wiring Old Bones Restoration Forum 1 09-28-2011 08:08 PM
86 Caprice cluster wiring chart DeVilleL13 Chevy Caprice 0 09-30-2010 03:40 PM
1996 Caprice 4.3 Wiring Help (unplugged connectors where to?) cyteone Chevy Caprice 8 11-23-2009 10:09 PM
Hot wiring a 94 caprice Etrackstar Chevy Caprice 2 07-19-2009 09:30 PM
1995 caprice 9c1 wiring harness and ecm jmreaper Private For Sale Classifieds 0 03-03-2009 12:48 AM




Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0 ©2011, Crawlability, Inc.
This site is not affiliated nor endorsed by General Motors Corp. Chevy Impala and related trademarks are the property of General Motors Corp.