IC's notoriously have a whole bunch of different sub-part numbers. Generally I've found that you can "wing it" with just doing PN matches. If you have a space UAA1250, I'd give it a shot, just don't overheat it. Please update this as you try it, as I need to do the same to mine. I have the exact same symptoms as you.

 

I've found a couple ebay uaa1250's, maybe i'll get one to try.. are there any special steps to take or precautions on de-soldering/re-soldering a component like this ?

 

If you haven't done electrical soldering before, I recommend trying/learning on something else first. (Something at least cheap and easily replaceable).

I taught myself when I was younger by taking a working radio, desoldering (almost) everything, and then soldering everything back together.

There also some robotics soldering kits that teach you soldering, and those teach you soldering. A worthwhile skill to learn in general, as the best investment is an investment in yourself!

In general though, you don't want to overheat the chip, so when you heat up the legs of the IC and the pad, quickly apply solder and then move to the next pad/leg. To remove an IC, use a solder sucker with an iron to remove as much solder as you can, and then in a last final step, heat all the legs as evenly as you can and then pull the IC off. Shouldn't be any force or violence. If it's not moving there's cold solder somewhere.

 

Thanks ! I have soldered before, even stuff in my r129, but never on micro chips before so I was asking more about that specifically.
Thanks for the tips !

 

So I ordered a UAA1250 chip on ebay, should be here in a couple of weeks.. as soon as I get into it i'll keep you posted !

 

EricS17,
What was the result of this repair? I'm in the same situation right now and it looks like I will need to do the same thing.
Thanks,
seafarer

 

Works great once it's all back together !

 

Thanks for the information. I found a couple of IC's on Ebay for $5 for 2 pcs. Took the unit out of the car and bench worked it. After Re-installing it the lights now come on when the doors are opened.
Cheapest solution yet on this car.