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For your specific vehicle, you may want to keep a quart of oil with you. Learn how to check your oil level, and try to check it every other time you fill up your car. I'm not sure which engine is in the Amigo, but I do know that some of the Isuzu engines around that time tended to drink oil and destroy themselves. Otherwise, try doing a search on car emergency kit. Many of the items will depend on where you live. I'm in the mountains, where snow is our biggest problem, so tools to stay warm and get unstuck figure big in my kit. My minimum kit has o Flashlight o Blanket o First Aid Kit o Fire Extinguisher o Jumper Cables o Shovel o Water I add to that: o Duct tape o Tow-strap o Energy bars o Maps o Reflective vest o Bungie Cords o Hoody o Assorted fuses o Headlight bulb I assume you bought your truck used. Make sure you have all the parts you need to change a tire, like a spare tire, jack, wrench, etc. Try changing a tire in your driveway, just to see if all the parts are there and you know how to use them.
Stop your brats secretly smoking in the house! As a know it all you seem to have everything else covered.EXCEPT a bad connection,plus batteries bought from cheapskate pound shops are faulty already that's why they are in the pound shop! Heavens above why do we bother with know alls?
Are your smoke detectors connected to electricity? some connect to a live power supply as well as having batteries. A possibility could be that your power flickered off and on which caused them to set off?. If you don't think that's it, buy a cheap one and set it up. If that goes off theres something in the air which is activating them. Maybe a gas leak, you should get your house checked for safety reasons anyway.