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something wrong with shop manual

5.9K views 28 replies 8 participants last post by  Doug D  
#1 ·
i have a dodge shop manual for my 1995 dodge grand caravan and while looking up the wiring diagram i found it shows a transmission relay but no wires going to it. it shows the wires going to the auto-shutoff relay i traced the wires from the solenoid pack to the TCM and the red power wire is stiff as a board like it had had to much amperage go through it. i tried to find the fusable link but it doesn't say where it is. i am planning on getting some red 16 gauge wire like the original and bypass the bad part in the engine compartment, but i am not sure of the routing. the book is kina vague.
 
#4 ·
Don't splice without proper diagnosis - this can result in vehicle fire.
What problem are you experiencing, what are the symptoms and the results?
I don't think fusible links were used in many vehicles by 1995.
 
owns 2011 Chrysler 200 Limited
#6 ·
Couple thoughts...
Reverse + Second = Limp In Mode. This can be many things and may or may not be electrical in nature... I had a limp in on my '95 Intrepid due to a stripped planet spline.
Would be ideal to scan for codes - unfortunately its probably not OBD2
Does the stiff wire show any signs of overheating - discoloring or burn marks. If your thought is that the copper in the wire has melted due to high current - then the wire should show signs of overheating on the insulation
Fusible links I believe are in the power distribution center - high capacity replaceable fuses.
 
#8 ·
And without a scan tool that can access the transmission computer that’s all you can do. There are a huge variety of conditions/issues that will leave the transmission in limp mode, only second and reverse. It can be electronically or mechanical.
 
#9 ·
The latest & greatest software update (TSB #18-24-95) worked wonders for curing 'erroneous' limp-in faults:
Look for any software update label on the TCM or under the hood that has part # 4686606 on it.

Having the TCM fault codes would help a lot with diagnosis. It would give us a direction to go in and tell us whether the transaxle has to come out or not. Limp-in will get you to a shop that can do old Chrysler OBD1 diagnostics. Find one.

These early vehcles used the ASD relay to power up the TCM & solenoid pack, later vehicles had a dedicated EATX relay. The minivan is an AS body.

If the Rd (T16) wire looks like it took a lot of current, a previous owner may have hot-wired the transaxle 'on'. The TCM will turn itself off by lifting the ground to the ASD relay. Do not 'force' this circuit on if it draws significant current.
Fuse # 15 in the underhood PDC should blow if current it excessive. Make sure that someone didn't bypass it or install a bigger fuse.
If someone has messed with the wiring, it is important to put it back to the way it was before diagnosing anything.


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#11 ·
What do they call this relay?
Some vehicles had a TCM safety shutdown or back-up light relay.
Can you scan & post an image of this relay?

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#13 ·
It eventually became known as the EATX (Electronic Automatic TransaXle) relay and may have had labelling begun in the diagrams for it, but treat it as the Safety Shutdown Relay or Automatic ShutDown (ASD) Relay during your diagnosis.
Confusing I know, but a good question to ask.
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#15 ·
The EATX is the Safety Shutdown relay.
It will power down the TCM & Sol pack if the TCM detects a fault that could damage the transaxle or vehicle if allowed to operate and shift normally.
It will enter a default (limp-in) to keep the vehicle drivable and safe, albeit at a reduced level of operation.

The ASD relay will disable the ign coil & fuel pump relay if it doesn't detect engine rotation after a second or so (i.e.- after a collision or stall, etc) via the crankshaft position sensor. This is also a safety measure.

Splice T16 is in the wiring harness bundle in the RR corner of the engine compartment.


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#18 ·
There may have been a short on T16 at one time? The fuse should have blown with any damaging or excessive current. Hard to say what a previous tech or owner was thinking or trying to do. Is the correct rating fuse in it now?
 
#20 ·
You don't know the past history. Check all of them and make sure that they are the correct amperage for the circuit. I've had cars come in with larger fuses than specified because they kept blowing them. SMH.
 
#25 ·
This is why I'm so glad that after 35+ years of working on cars outside, I finally had a 3-car garage built. No more lying in snow or rain, freezing or baking, no more waiting for decent weather, or weekends, or enough lighting. No more packing up parts and tools left in the driveway, or loosing fasteners into the background of asphalt.
 
#27 ·
I'd like to build a garage one day, but we have other house projects to complete first. A few months ago, we had the master bedroom redone. Next is one of the bedrooms. Have a new vanity for the master bath to get installed. Driveway is way overdue for fresh gravel. Sigh.....it never ends.

Wife wants to relocate back to Colorado (where she grew up) so even if we invested in a garage, we'd more than likely never recoup the money invested. I don't see the sense in building a garage if we are going to sell the house in the next 3-5 years.

At a minimum I'd consider at least a car port so the vehicles would have some cover. But those aren't inexpensive either.

I am so tired of working on our vehicles in the weather.