Drawing Hi this morning I switched my quest on and all i could see was the field accquiring satellites and below "drawing" This lasts at least an hour since I switched on. Yesterday I loaded a route to chicago (from Florida) thanks Max

The hum is telling you the pump has failed.

12.6VDC is a good output from a vehicle battery. The measurement of 8.8Volts is not drawing anything, it is Voltage not current...you can draw current in Amps or Watts only. Check the Amperage draw of your Amplifier to see what it draws and compare that number to the number of Amp Hours written on the battery. Yes, it may be what is draining the battery, like leaving your headlights on overnight! Do the math! Drawing the battery down to a very low Amperage could damage the cells in it, that's why golf carts use what is known as Low Dwell batteries that can discharge way down without damage. Have it tested or test it yourself with a relative gravity tester available at your local auto parts store. Read the instructions carefully...it will tell you how bad the battery is damaged and if you need a new one. Have fun learning stuff like I do...

I had this problem and found the secondary air inj. pump was coming on because of corrosion. Replaced relay to it cleaned it up and so far so good. It is located under the vehicle on the drivers side almost below the seat.My girlfriend happened to hear the pump running at 4:30 am one morning while letting the dog out

Here are two possible solutions, since timers are made different ways:

1) Diehl timer has 5 terminals
Drawing below shows wiring for Diehl SPST:


2) Your timer might also be wired as follows:
Two screws marked 'timer' are for 120Volt Hot and Neutral that power the clock motor (in drawing above, these are terminals 1 and 2).
Another Hot wire connects to COM. (in drawing above this hot wire shown connecting to terminal 3)
Load wire connects to terminal NO (in drawing above this wire shown connecting to terminal 4)

3) NO is Normally-Open turns ON when tier turns ON
NC is Normally-closed is ON all the time, EXCEPT when timer turns ON. So NC terminal turns OFF when timer turns ON.

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Something,is drawing too many amps,most likely the compressor.

if the clips which hold the fuse are loose a high restistance is created and heat in generated,,is the starter moater spinning okay if not might be drawing excesive current and fuse cant take it look along those paths check main bat leads are tight

Sounds like something is drawing power from the battery when you are not driving your car. Check interior lights, head lights, brake lights, aftermarket stereo or trailer wiring.