I am writing this for the main fact that I am an Automotive Technician by Trade and out of the many cars that I work on every day there are always a few here and there that bewilder me. More troublesome problems like electrical sometimes bring out the best of My skills to fix. All of them have been solved, but finding the problem many times turns a Master Auto Doctor into Sherlock Holmes.
The first of these vehicles is a Ford, now before you roll your eyes and say 'Of course that is why, that blue oval in the front of the car is the problem.' I will say this first, I own a Ford Ranger and it is running perfectly. As with any vehicle, They are only as good as you take care of them. If you keep up with the Maintinence and a few repaires nessessary, Said vehicle will last a long time.
This Ford SUV came in with a check electrical problem. Seemed easy enough at the time, the customer pulled the horn fuse because they said the horn would not stop honking like someone was laying on the horn. I pulled the car in my bay and checked the fuse block and the horn fuse was missing, so I grabbed the same amperage fuse as required and braced myself for the loud blair of the horn as I installed the fuse and nothing... 'Did they disconnect the horns maybe?', I opened the hood and they were there all connected, I pressed the horn button and they honked, I turned the steering wheel back and fourth with no shorts setting the horns off. A test drive afterwards found no problems and the horn relay switched with a known good one since the relays can stick sometimes. I also checked the alarm system and found no problems to set the horns off...Strange. The customer needed the vehicle, so we let them pick it up and the next day brought nice sunny sky and a Ford SUV that would not stop honking.... Its annoying when problems like this happen, Its hard on the customer cause they need their vehicle, Its hard on us as a buisness for the fact that you can lose a customer over this, but the said problem could not be traced out the day before.
"Oh, and I forgot we changed out the Cigarette lighter fuse before we brought the car to you. We did not think it was relavent" That what was said to us when we took the car back in again. Before I continue this story, I must emphansize the importiance of the right kind of information or too much info given when you bring the car into an Automotive Repair Facility. If you have an electrical issue with your car and you have to replace a fuse elsewhere because it burned out, It is definately relivant information. With every vehicle built after 2001 having Controlled Area Network systems where a lot of the electrical circuits are running togeather. Too much information is like saying a long day's story, but it may also be relivant how the weather is on certian problems. After disconnecting the horn fuse and bringing the vehicle back in again, I replaced the Cigarette lighter fuse, and then the horn fuse and I was right back to square one where the horns were off and worked normally again. At this time the Service Manager was getting irritated, We were right back where we started in the beginning.
With no problems found again, the customer came back and shortly after she stated the car, the Horn went blarring again, but It happened here this time... With the customer irritated, and the service manager angry, I brought the Vehicle back in and checked the fuses, The Cigarette Lighter fuse was blown and I had to remove the Horn fuse again. I replaced the Cig Lighter Fuse and everything worked normal again. It was time for me to adorn the "Deerstalker Hat" and "Magnifying glass" there were no metal or coinage lodged into the Cig. lighter, so something must have happened shortly after she started the vehicle. With the said vehicle not acting up again, I had a strange request. "Could I observe the customer starting her car before she leaves with it again?" "I don't know,... why?" grumbled the service manager "It is obvious that she is doing something when she starts the vehicle that I am not" I replied. Later that day when she came to pick up her vehicle, I snooped by as if I was going to another vehicle and glanced in.... She took her keys out,... started the vehicle...(Good so far) she then reached into her purse and pulled out her cellphone charger with phone attached and plugged it in the Cigarette lighter then, Hoooooonk- Eureka! She got out of her car and I turned the horn off by replacing the Cig Lighter fuse. "Could I inspect your cell-phone charger?" I asked Then I explained "The horn did not stayed honked for us"- as I disassembled the cell phone charger- "It only did when You were driving and not your husband who picked up the car the other day," " If he nor I could, then I deduced that it was something that you were doing when you started said vehicle" I opened the halves of the cell-phone charger where wires were shorted togeather. "Blowing the Cigarette fuse bridged a gap in the C.A.N. network causing the horh relay to switch." Shaking her head and smiling she exclaimed "Technology, go-figure" "Its Elementary, Have a nice Day" I replied.
This is just one happening, I will have many more soon. Two statements of advice, never buy one of those cheap cell-phone chargers at convienence stores, and another, If you are going to use the Cigarette lighter in your vehicle for charging anything or for another power source, make shure that your Cig lighter/power source can handle that much amperage, (That information is in your owner's manual)