

| Subject: | Re: Dang driver lowbeam and front driver turnsignal |
| From: | David Beierl |
| Date: | Fri, 6 Jan 2017 20:05:26 -0500 |
The $5 ones are what I was calling $6. They're functionally similar or identical. Without pulling off the back I couldn't recommend one over another. They're different suppliers of essentially the same item -- sometimes no difference, sometimes the later ones are cheapened, sometimes they're improved. Thirty ton press for example the later SKU is a significant improvement on the earlier one. For these, given a choice and no further information I'd go for the lower-numbered SKU, but I wouldn't make an issue of it. Regardless, they're tremendous value for money and you can leave several scattered about. The $7 one is a $5 one with a light, worth the two bucks unless the $5 one is free with a coupon. The automotive one is a natural if you're working with a points-type ignition system (dwell function) or a non-tach vehicle, otherwise marginal value for money I think. Push-button on is bad for the toolbox, but auto-off mitigates it. Tach is nice (it's frequency with a conversion for number of cylinders and an inductive input). Comes with a thermocouple probe but I sincerely doubt that the probe is good for the range specified on the meter (probably max 400F or so). Lack of a duty-cycle function on the frequency measurement is a disappointment. On Fri, Jan 6, 2017 at 7:42 PM, Stuart MacMillan <stuartmacm@gmail.com> wrote: > Good ole Harbor Freight! Some for $4.99, which one do you like? > http://www.harborfreight.com/catalogsearch/result?q=multimeter > > > > Stuart > > > > *From:* dbeierl@gmail.com [mailto:dbeierl@gmail.com] *On Behalf Of *David > Beierl > *Sent:* Friday, January 06, 2017 4:24 PM > *To:* Stuart MacMillan > *Cc:* vanagonlist a > > *Subject:* Re: Dang driver lowbeam and front driver turnsignal > > > > Stuart, Harbor Freight has $6 (sometimes free) meters that are perfectly > adequate for almost all van electrical stuff (better than the RS folding > one in some ways) and easier to find/use for one fifth the price. > > What you need in a van digital multimeter are: > > Banana jacks so you can use different test leads or adapters. > > Power switch that is not a pushbutton that could get turned on in your > toolbox. > > Manual ranges -- auto-ranging is nice, but if you can't turn it off it can > drive you nuts in some circumstances. Much better to not have it than have > one that can't be turned off (most auto-ranging *can* be turned off). > > > > Accuracy -- the cheapest digital meter is more accurate than all but > extremely expensive analog meters, and accuracy is specified in terms of > the reading rather than the meter full scale. It will be good enough, > sight unseen, until you are advanced enough to work out the ramifications > yourself. > > > > High impedance -- the standard input impedance for electronic voltmeters > is ten megohms, which is excellent. The lowest I've seen on a digital > multimeter is one megohm, which is still plenty for any normal van > purposes. Cheap analog meters have an impedance of 2,000 ohms for every > volt on the scale, so a ten-volt scale would have 20,000 ohms. Sounds like > a lot, but it will drag your oxygen sensor practically to ground. Huge win > for digital in this case. > > > DC Volts -- 20, 2, 200 mV (fancier meters with more "counts" may read up > to 3999 or 4999 on a range instead of 1999). > > > > DC Amps -- Ten or twenty amps and a milliamp range of some sort. Note > that the high-amp range on cheap meters is usually un-fused, so if you try > to read volts with the leads connected for amps you will smoke the meter > shunt and maybe melt the meter case. OTOH the fuses on my fancy Fluke > meter cost more (each) than the entire HF meter... > > > > Ohms -- 200 ohms to at least two megohms ranges. You won't actually use > these often, as you'll mostly be concerned with resistances that are too > small to measure accurately (or at all) by this technique. Instead you'll > be using the 200 mV scale on live circuits to get voltage drops directly, > which is the number that matters in any case. In effect you are turning > the van and meter together into an extremely fancy ohmmeter that can > measure milliohms or even microohms. > > > > Diode Test -- Like ohms, but shows voltage across a semiconductor that's > conducting. Modern digital ohmmeters use too low a voltage to turn on a > semiconductor junction, so they have a special function that will. It's > nice if this function has enough voltage to turn on blue/white LEDs -- some > do, some don't. Pretty much all of them will work with red/yellow/green > LEDs, and all will work with germanium or silicon diodes. > > Your $6/free HF meter does all this. For an extra buck or two you can get > one with a light. > > Things that are nice: > > > > Continuity buzzer -- nice, but can bite you since they usually beep > somewhere between 50 and 150 ohms. That's ok if you're looking at a > circuit with an incandescent light installed in it, but not for wires > connected together, switches and so forth. But if you ever get a chance at > an old Hickok meter with ?Vari-Trak? (audio beeper that changes pitch with > the meter reading) grab it. It's a huge pity they went out of business and > nobody has picked up this idea. > > > > Bar graph display -- digital meters typically take 2-4 readings per > second, and average the reading over the measuring period which will be > roughly one-third of the cycle time. For rapidly changing readings (like > the oxygen sensor on the van) this can lead to readings that appear > random. Slightly fancier meters often have a secondary bar graph display > that isn't precise but responds much more quickly than the main display. > > Illumination -- can be very handy. If I had to pick between continuity > buzzer and light I'd probably pick the light. > > > > Display hold -- lets you make a measurement and capture the reading to > look at in better conditions. > > > > Min/Max -- captures the highest and lowest values of a reading. Handy for > example when measuring voltage drop during cranking. > > > > Frequency/duty cycle -- good for PWM (pulse width modulated) signals like > the 2.1l Idle Control Unit output, LED dimmers and such. > > DC+AC -- digital meters on DC ranges typically ignore AC. This function > gives a separate reading for any AC component of a DC signal, like ripple > and hash on the alternator output. Probably only on quite fancy meters. > > Type K thermocouple input for temperature. Even nicer if you can switch > the reading for F or C. > > > > Auto-timeout on light and meter power -- can save your battery. Can also > be a nuisance, so even nicer if you can shut if off. > > > > Yours, > > David > > > > On Sun, Jan 1, 2017 at 11:19 PM, Stuart MacMillan <stuartmacm@gmail.com> > wrote: > > No, you are not being obnoxious, basic electrical troubleshooting requires > one. At least get of one these, I give them away to my friends and family: > https://www.radioshack.com/products/radioshack-22-range- > pocket-digital-multimeter I now have a Fluke meter, but I still have the > Radio Shack pocket VM I bought at least 30 years ago in my Vanagon on-board > toolkit. > > Stuart > > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf > Of Dennis Haynes > Sent: Sunday, January 01, 2017 7:43 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Re: Dang driver lowbeam and front driver turnsignal > > I’ll ask for forgiveness in advance for sounding obnoxious. Besides > changing parts did you consider using a meter? Each headlight high and low > bam does have its own fuse, yes 4 fuses for the lights. They are after the > switches in the headlight circuit. The turn signal sounds like a bad > ground, probably at the socket itself. The 4 way flasher is not an > independent circuit. The flasher will not flash unless it sees enough > current being drawn for two bulbs. High resistance in the working or a bad > bulb will prevent the flasher from working. This acts as an indicator of a > turn signal being out. The 4 ways connect 4 lamps so if one or two were out > it will still flash. Headlight grounds are also a common problem. There are > grounding clusters above the fuse box. It is common for the quick slide > connecters to both corrode and also break just from heat and age. As the > headlights are higher current items new ground connections near the > headlamps are a good idea. > > Dennis > > > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf > Of C B > Sent: Sunday, January 1, 2017 7:48 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Dang driver lowbeam and front driver turnsignal > > My driver lowbeam won't work at all. > What didn't help: > Swapped bulbs. > Replaced turnsignal ring & stalk. > Replaced dash headlight switch. > Traced wires and pulled apart the fuse block and driver's side wiring > stars connectors. (Should I try the passenger side one?) > > In addition, the driver front turnsignal stays on and won't flash whether > just parking lamps, or either headlight combination is on. > BUT the driver front flasher works in emergency 4-way flasher mode > regardless of parking light/headlight configuration. > I know the 4-way flasher is its own circuit, so where in the > parking/headlight circuits are likely culprits? > > Other than that, Cunegonde finally home and ready for visual restoration. > It's been a long several years since the engine debacle. > > > CUNEGONDE 1985.5 2,1l WBX 4sp Westfalia > > >
Have something to add on this topic today? Revive this thread in the forum »