DC voltage off
I have an 07 Jayco 36RLTS in which (I think) everything works. Except the far stern 12 volt lights. The ceiling lights and the undercabinet halogen puck lights. The only place I can get voltage by met...
Forum Discussion
Matt_Colie wrote:
O\Use a test light and not a meter.
Matt
AMEN to that.... I have both (Multiple test lights and multiple meters)
I have found problems quickly and easily with the test lamp which the meter said did not exist.
WHY
Imagine this following circuit
Battery----Wire---Bad spot with 1,000 ohms resistance------Meter
The meter is a 10,000 ohms per volt set on the 20 volt range so the input impedeance of the meter is 200,000 ohms
The voltage the meter sees is thus 13.6* 199,000/200,000 (Very nearly 13.6,in fact the difference is less than the error range of the meter)
With a test lamp.. The lamp can be 1-2 Ohms Now the voltage it sees is 13.6 * 2/1002 or a tiny fraction of a volt.. IT will not even glow
THIS happned to me.. Twice so far... In this rig Once was a bad connector, once a bad wire. (not counting battery connection issues)
I do some work at a thift store... Happened to the owner's wife Wed. (Battery connection) She has new cables now.
The test light shows NO LIGHT where the meter shows NORMAL.
