QuestionIs there a simple DIY way of checking parasitic drain from my 1992 Saab turbo, for I do not have much auto repair experience. I seem to fully discharge my battery after 3 weeks of none use. I have checked all lights, including those at the back but to no avail.
Thanks
AnswerManuel:
Yes, there is a simple way to detect leakage currents that may be causing your batter to discharge. First, you need to procure a volt/current meter. Digital ones are commonly available quite cheaply. In fact, at <www.harborfreightusa.com, there is a sale on one for $1.99 mailorder [part number 90899]. I am sure you can get a similar one in Canada for under $10 at a local store.
Anyway, to measure the leakage current proceed as follows:
a. Turn off all controls, lights, doors closed, etc.
b. Disconnect the positive terminal from the battery
c. Set up the meter to read "amps"; its usually a 0-10 amp scale.Make sure the leads are plugged into the correct sockets on the meter. Turn it ON.
d. Connect the positive(red) lead to the battery terminal post...this may take some ingenuity, using clips, wire, or anything else.
e. Connect the black lead to the wire that WAS on the positive battery post
f. If there is any leakage current, it will now show up on the meter.
g. To determine which circuit is causing the leakage, selectively remove the fuses from the fuseblock one at a time.
If there is no appreciable current leakage (less than .050 amp), the battery is defective OR the alternator is not recharging it..the subject of another question.
Hope this helps,
Jerry
