I have a 1994 passport that goes into reverse and also goes into 1st but wont shift to 2nd or higher. I know from reading some of these forums this seems to be an ongoing issue with these trucks. Also I'm having an issue with the brake light and rear anti lock light staying on. If anyone could help me resolve these issues. Please do.

I know from reading some of these forums this seems to be an ongoing issue with these trucks. .....
what did the posts say was the cause of the "ongoing issue"?

i'm assuming this is an automatic transmission. does it go thru the gears if you shift thru the gears manually with the gear shift? or are you saying it you can't move the gear selector other than P R N 1 ?

without further info, it sounds like the standard ole answer: the charging system, probably the alternator, but check the wires, the connectors, the grounds and especially first the connections at the battery.

//bc

the truck will shit through gears manually. Just won't automaticlly. I put brand termanels on it already I check to see if there was a broken wire but couldn't find one. The issue I was talking about is to due with the voltage and there are certian silionds that blow from what I have been reading. But I'm not sure I don't want to spend a fortune to fix it.

The issue I was talking about is to due with the voltage and there are certian silionds that blow from what I have been reading.Solenoids don't "blow"... fuses blow. A solenoid will generally stop working due to voltage being too low for it to provide enough force to move whatever it is designed to actuate or it will fail when the coil itself swells enough to prevent movement. You, as trooperbc pointed out, likely have a low voltage problem. The Brake and Rear ABS lights and staying on can tend to indicate the beginning of the end for your alternator.

I ment sensors when I was talking about silionods . So what alternater do you guys recommend to replace it with

I had the alternater checked today. Registers 14.02 when running. I drove it to the shop to have tested and the following problems accured. The truck will shift trhough all gears when cold but will only shift into 1st and 3rd when hot. the check engine light comes on then goes off. The winter button does not respond at all. but power button does. All lights light up when I first turn the key. Any ideas

...the check engine light comes on then goes off. ...

well that's a *good* sign, in a way. that means there is probably a code stored in the diagnostic system. do you know how to jumper the diagnostic connnector and read the codes yourself?

i would start there. you might also want to start doing some searching and researching on the automatic transmission gear selector mode switch/sensor (it goes by different names).

and...when they tested the alternator, did they do a test *under load*? if you don't know, find out. it could still be the alternator.


//bc

well that's a *good* sign, in a way. that means there is probably a code stored in the diagnostic system. do you know how to jumper the diagnostic connnector and read the codes yourself?

No I'm not sure how to do this.

read this thread which also has links to other posts for a detailed description of how to read the codes
once you know where your diagnostic connector is for your rodeo. I don't know where yours is, someone chime in with location !

here's the link
http://www.automotiveforums.com/vbulletin/showthread.php?t=667340


//bc

I had the truck towed to ammcoo they are gonna do a full diagnostic on it and find out what the problem is with it. I will post whats going on as soon as I find out Thanks for the help so far perbob29

This is going to be interesting. $5 says they recommend a new tranny.

Sorry to say now, but I would NOT have chosen AAMCO - even if it didn't need a new transmission - they will tell you that you do.

Ramblin Fever.... where is the CEL diagnostic connector on the 94 ?


and, yes just seeing the letters aamco gets one to squirm. my bet after rereading is, if its not the alternator, then it is the mode switch/sensor, and my bet is that a transmission shop is not even going to test it.


//bc

Sorry, Trooperbc, forgot to answer that before, I meant to.

The CEL connector is under the dash, just under the latch to pop the hood, drivers side, left of steering wheel.

No, I personally know for a fact AAMCO does not test the mode sensor OR the alternator - they tried to pull the $3k dollar crap on my tranny some 7yrs and 95k miles ago, when all it was was a faulty range mode sensor.

update So far they have pulled 8 different codes and found three bare wires in the truck. They are running a couple more test to figure out what is happing I will keep yous updated as I get the reports. Thanks agian perbob29

well that's good. when they tell you that, it's a good idea to get them to tell you exactly what those codes are. did they? if so, what are they? and are they CEL (CheckEngineLight) codes or are they TransLight codes? and do you know what wires?
sounds like you got a shop that's willing to *work* at it, which is good. hope it ends up being (realatively) good news

//bc

to update everybody. The trans shop finally found out the problem. The main powertrain computer was fried and also 4th gear in the transmission. lets just say at 2,800 dollars it's not getting fixed. Thanks for everybody's help

AAMCO - All Automatics Must Come Out.
I love that!

Personally, get yourself a flat-bed, load her up and take her somewhere else for their opinion.

Did you ever get your alt tested *under load*?

yes had the alt tested and was reading good. I know the guy at the amcoo shop and he did test the sift sensor and was fine. The main computer was completely fried. Hook up bypass computer and the truck would shift through front three gears fine but when it ingaged in fourth went straight to neutral

That's too bad; probably did serve it's time in life though, I mean we are talking a 13yr old truck here - not one that's 3 or even 9yrs old.

If the engine and the rest of the body are in superb condition though, it will be cheaper in the long run to repair it then it would be to buy a new vehicle.

Keep us posted as to what you decide; if you decide to part it out, I might be interested in some parts; otherwise, if you sale it with a bad tranny, you might be able to get $1k-1,500 or so.