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Two wires from the car battery, not colour coded, testing with a multimeter/voltmeter how do you tell which one is "negative" (-) and which one is "positive" (+)
Red or "+" is always positive, it is usually the easiest to access, the "+" sign will be on the battery
IF your battery wires are not red/black – then the actual terminals should be a different size.
Another easy way to determine +/- of your car battery is to put your red lead on a battery post and the black lead on a good ground point. you will either have +12V or 0V – telling you which terminal is which.
red is + + goes to starter…- goes to ground
Hi, I replaced 6 spark plugs (Bosch) in my 1993 nissan quest xe. how can I visually inspect if one of my 6 spark plugs are good or bad? I saw a spark plug tester:
kartsportnews.com/content/2009/prod_zaptester.html
how can I really do this test without the use of the tester?
Can I take off the spark plug, leave it hooked up to the plug wire, and then put ANOTHER spark plug in the hole were the "testing spark plug" was, then GROUND the threading of the testing spark plug to the chassis or battery negative terminal of the car, and finally start the engine and see the "dismounted" spark plug actual SPARK???????????????????????
CAN THIS WORK? Ive always wonder….could it work? it should work im guessing since the spark plug only archs the high voltage through…thats why grounding it properly to SEE the spark…
And the cylinder that had the plug removed, should only lower the RPMs…right? missfiring!
can it work?
yes, you can ground the end of a plugged in spark plug and see spark, but there is a chance of you getting zapped with the high voltage as well, so be careful.
Why don't you just spent the 10 or 11 dollars and but a spark tester. Holding onto any of those wires with anything can give you a jolt that you will never forget. it is so much easier with the spark tester.
This is a valid test to see if you have spark or not, but it isn't a valid test to see if the spark plug is operating properly under compression.
Dragons give Blues a bloody nose
9:10am Saturday 30th April 2011
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THE monkey is off their back at last after Newport Gwent Dragons beat their closest rivals Cardiff Blues for the first time for five years in a tense Magners League derby at Rodney Parade yesterday.
The Dragons made it a right royal day of celebration as they ended an appalling run of eight successive defeats at the hands of the Blues.
Aled Brew had special reason to mark the occasion as his 16th try of the season made it a record for any player since regional rugby began, beating the previous total held jointly by Tommy Bowe and Aisea Havili.
and emergency full back Steffan Jones also celebrated as he scored the Dragons’ first try in his first start for them, then added a late long range penalty.
they nearly paid a heavy price when lock Adam Jones was yellow carded and the Blues scored 12 points including two tries while he was off the field.
But the Blues lost an opportunity to march straight into the playoffs and they will now have to wait until the final game of the season against the Scarlets next Friday, with the Ospreys still in the hunt.
The Dragons followed up their first double over the Ospreys with another great derby win.
Wales coach Warren Gatland was a Rodney Parade visitor again and he saw the Dragons make an electrifying start, a Jason Tovey kick rebounding nicely for Brew who set Luke Charteris away down the left before the Blues got back to cover.
Jones coped well with an early tester in his first start for the Dragons out of position at full back, but the Blues took the lead with their first threat when Dan Parks landed a penalty after Phil Price went in from the wrong side.
But the Dragons stormed ahead two minutes later with a superb try by none other than Jones.
Dan Lydiate and Tovey both handled miraculously, then Jones took over 30 yards out. Initially he revealed a real turn of speed, showed the ball to the cover, dummied and with the defence fooled swept on for the try which Tovey converted in style from the touchline.
The Dragons were fired right up playing downwind and after 14 minutes they scored again. Toby Faletau brushed through an attempted tackle by Xavier rush and when the ball came back Tovey put in one of his trademark chips to the left where Charteris gathered and immediately put the ball infield to Brew who made it to the line for the 16th time this season.
The Dragons were growing frustrated by the number of penalties James Jones was awarding against them and a free-for-all broke out. Blues wing Tom James ran 20 yards to join in and after warning the rival captains the referee reversed his decision and gave the Dragons a rare penalty instead.
and they had another, more decisive, one when Jamie Roberts was tackled by Ashley Smith and when he failed to release from in front Tovey landed the simple penalty.
But the Blues were playing direct, route one rugby and Tovey was badly shaken in one tackle, but resumed after lengthy treatment.
Parks missed a second penalty shot and the referee penalised the Dragons yet again, but Charteris pinched a Blues line-out only for his team to be reduced to 14 men just before half-time when lock Adam Jones was yellow carded for preventing release.
and the visitors took advantage immediately when rush picked up at the base of a scrum and Sam Warburton was at his shoulder to nab the try which Parks converted.
Pat Leach replaced neck injury victim Adam Hughes at the interval while the Blues lost Casey Laulala at the same time and Wales lock Bradley Davies had to leave the field with a shoulder injury two minutes into the half.
But with the Dragons still down to 14 men the Blues drew level when replacement Deiniol Jones won a line-out and rush was driven over for the try. Parks inexplicably struck an upright with the conversion which would have given his side the outright lead.
Jones returned for the Dragons, but they lost flanker Gavin Thomas who had been touch and go with a knee injury, replaced by Lewis Evans.
Jones was only just short with a rare penalty shot for the Dragons, but the momentum looked to be with the Blues’ power game.
Ceri Sweeney made his expected appearance with a quarter of the game left while the Dragons brought on Dan way and Andrew Coombs.
The Dragons dramatically regained he lead when a decision by Tovey to go for touch rather than for goal paid handsome dividends.
Charteris won the line-out and the ball was driven over the line for the try by replacement Coombs, Tovey converting well from near touch.
With two minutes left the Dragons made sure when Jones landed a penalty from a yard inside the Blues half and then Wayne Evans dropped a goal with the last kick of the game.
Newport Gwent Dragons: S Jones, A Hughes (P Leach 40), T Riley (M Jones 49-56), A Smith, A Brew, J Tovey, W Evans, P Price (H Gustafson 75), L Burns, B Castle (D way 64), L Charteris (captain), A Jones (A Coombs 64), D Lydiate, T Faletau, G Thomas (L Evans 50).
Scorers – tries: S Jones, A Brew, A Coombs; conversions: J Tovey (2); penalties: Tovey, Jones; dropped goal: W Evans.
Cardiff Blues: D Fish, C Czekaj, C Laulala (D Hewitt 40), J Roberts, T James, D Parks (C Sweeney 64), R Rees, J Yapp (S Hobbs 27), G Williams, T Filise, B Davies (D Jones 42), P Tito (captain), M Paterson, X rush, S Warburton.
Scorers – tries: S Warburton, X rush; conversion: D Parks; penalty: Parks.
Referee: James Jones (WRU).
Argus star man: Toby Faletau.