fix for P0688 error code and fuse #29
#1
fix for P0688 error code and fuse #29
I'm new to posting so bare with me..
I recently just Fixed my leaking chain tensioner gasket and coolant flange on my 2004 1.8t. After i finished up and put everything back together, I found my car would not start. It would turn over but would not catch.
I was able to pull the code P0688 and did some research but i did not find anything to helpful. I also blew Fuse #29 for the ecm. I replaced it and blew another one immediately.
I knew that there was nothing wrong with my Ecm so i figured it was a short. I had moved the ignition wire harness when i did the chain tensioner gasket so i started there. I used my ohm meter by testing each wire in the harness and i found out that all of them where grounded to the engine.
I pulled back the rubber and sleeve surrounding the wires and found that 3 of the 4 harness all the wires inside were cracked and the wires where all exposed underneath. Here are some pictures of what i found. The Wires cracked more as i removed the sleeve and were supper brittle.
I will be buying a new harness but until i get it in about a week i used electrical tape and the cars start fine now.
Hope this helps someone in the future.
I recently just Fixed my leaking chain tensioner gasket and coolant flange on my 2004 1.8t. After i finished up and put everything back together, I found my car would not start. It would turn over but would not catch.
I was able to pull the code P0688 and did some research but i did not find anything to helpful. I also blew Fuse #29 for the ecm. I replaced it and blew another one immediately.
I knew that there was nothing wrong with my Ecm so i figured it was a short. I had moved the ignition wire harness when i did the chain tensioner gasket so i started there. I used my ohm meter by testing each wire in the harness and i found out that all of them where grounded to the engine.
I pulled back the rubber and sleeve surrounding the wires and found that 3 of the 4 harness all the wires inside were cracked and the wires where all exposed underneath. Here are some pictures of what i found. The Wires cracked more as i removed the sleeve and were supper brittle.
I will be buying a new harness but until i get it in about a week i used electrical tape and the cars start fine now.
Hope this helps someone in the future.
#5
harness
I'm new to posting so bare with me..
I recently just Fixed my leaking chain tensioner gasket and coolant flange on my 2004 1.8t. After i finished up and put everything back together, I found my car would not start. It would turn over but would not catch.
I was able to pull the code P0688 and did some research but i did not find anything to helpful. I also blew Fuse #29 for the ecm. I replaced it and blew another one immediately.
I knew that there was nothing wrong with my Ecm so i figured it was a short. I had moved the ignition wire harness when i did the chain tensioner gasket so i started there. I used my ohm meter by testing each wire in the harness and i found out that all of them where grounded to the engine.
I pulled back the rubber and sleeve surrounding the wires and found that 3 of the 4 harness all the wires inside were cracked and the wires where all exposed underneath. Here are some pictures of what i found. The Wires cracked more as i removed the sleeve and were supper brittle.
I will be buying a new harness but until i get it in about a week i used electrical tape and the cars start fine now.
Hope this helps someone in the future.
I recently just Fixed my leaking chain tensioner gasket and coolant flange on my 2004 1.8t. After i finished up and put everything back together, I found my car would not start. It would turn over but would not catch.
I was able to pull the code P0688 and did some research but i did not find anything to helpful. I also blew Fuse #29 for the ecm. I replaced it and blew another one immediately.
I knew that there was nothing wrong with my Ecm so i figured it was a short. I had moved the ignition wire harness when i did the chain tensioner gasket so i started there. I used my ohm meter by testing each wire in the harness and i found out that all of them where grounded to the engine.
I pulled back the rubber and sleeve surrounding the wires and found that 3 of the 4 harness all the wires inside were cracked and the wires where all exposed underneath. Here are some pictures of what i found. The Wires cracked more as i removed the sleeve and were supper brittle.
I will be buying a new harness but until i get it in about a week i used electrical tape and the cars start fine now.
Hope this helps someone in the future.
much cheaper than replacing the entire harness and a lot less labor also.
#6
I'm pretty sure that there is a kit for 1.8t Jetta's that replaces all the coil connectors and wiring, you just need to cut off the harness at a specific point and reconnect with butt connectors or scotch locks (whichever you prefer)....
#7
Yes i ended up buying this harness form ECSTunning
http://www.ecstuning.com/Search/ES7679/ES7679/
It is not meant for the A4 1.8t and i ended up taking it apart and replacing one of the wires in each of the plugs.
And instead of rewiring all the way back to the ecu which would have been a pain, i ended up using butt connectors and protecting them/hidding them in the heat shield that came with the harness from ECS.
http://www.ecstuning.com/Search/ES7679/ES7679/
It is not meant for the A4 1.8t and i ended up taking it apart and replacing one of the wires in each of the plugs.
And instead of rewiring all the way back to the ecu which would have been a pain, i ended up using butt connectors and protecting them/hidding them in the heat shield that came with the harness from ECS.
Trending Topics
#8
I had the same exact problem wires were cracked everywhere. I just bought a coil connector repair kit, each connector cost me like $23 at Napa auto parts. Once you cut the wires to put the new connectors the fuse #29 will blow immediately. The war won't star until you replace the fuse. So when you buy the connector s make sure you buy at least four fuses cuz it may blow again if you have some exposed wires. Some make sure your wires are not exposed. I hope this is helpful for someone out there.
Thread
Thread Starter
Forum
Replies
Last Post
schnitzelboy
A4 (B5 Platform) Discussion
0
11-12-2009 02:57 PM
PDX04a4
A4 (B6 Platform) Discussion
2
07-07-2008 03:33 PM