Question about Dewalt DW788 Heavy Duty 20" Variable Speed Scroll Saw: DW7881 Worklight

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How do I replace an on/off switch ?

Haven't used the tool in a long while and it would not turn on. the fuse is ok

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99 GMC Sierra headlights & running lights won't work!


Headlights Circuit Description
The headlights are controlled by the body control module (BCM) via the AHL Relay when the headlamp and panel dimmer switch is the AUTO position. When in the AUTO mode, the BCM receives a signal, (voltage) from the ambient light sensor, based on the voltage of the signal of n the sensor the BCM turns the day time running lamp (DRL) lights OFF and the headlights ON. The headlights can also be turned on by placing the headlamp and panel dimmer switch in the head position.
The relay coil is fed by the headlamp and panel dimmer switch or the BCM and the battery B+ buss bar in the underhood bussed electrical center (UBEC). The BCM supplies current to the relay based on the input from the ambient light sensor via CKT 352.
The relay output feeds the LT HDLP and RT HDLP fuses to supply current to the low and high beam lamps on CKT 1340 and CKT 1240. The ground for both the low and high beam lamps is supplied via CKT 524 and CKT 525 to the dimmer switch. The dimmer switch uses CKT 1850 for a ground to G203.
Some circuits are monitored by the BCM, and upon failure may set a DTC.
Park/Side Marker and Tail Lamps
The park/side marker and tail lamps are split between the following 4 fuses:
?€¢
The FR PRK


?€¢
The LR PRK


?€¢
The RR PRK


?€¢
The TRL PRK

These fuses receive voltage from the park lamp relay. When the headlamp and panel dimmer switch is in the auto position, the body control module (BCM) controls the relay by grounding CKT 1080 based on the input of the ambient light sensor. The park LPS fuse supplies battery positive voltage (B+) to the relay at all times.
When the headlamp and panel dimmer switch is in the PARK position, the relay is by passed through the INT PRK fuse. Current flows from the PARK LPS fuse through the headlamp and panel dimmer switch to the INT PRK fuse in order to feed the following fuses:
?€¢
The FR PRK


?€¢
The LR PRK


?€¢
The RR PRK


?€¢
The TRL PRK


Park Lamps Inoperative

Step

Action

Value(s)

Yes

No

1

  1. Turn the ignition OFF.
  2. Connect a scan tool.
  3. Turn the ignition to the ON position.
  4. Using the scan tool, check for any DTCs in the body control module (BCM).

Does the scan tool show any DTCs ?
--
Go to Diagnostic System Check - Body Control System in Body Control System
Go to Step 2

2

  1. Turn the headlamp switch to the park position.
  2. Connect a test lamp from (back probe) terminal B of the headlamp and panel dimmer switch to ground.

Does the test lamp light?
--
Go to Step 4
Go to Step 3

3

Locate and repair the open in CKT 240 (ORN) between the switch and the mid bussed electrical center (MBEC).

Is the repair complete?
--
System OK
--

4

Connect a test lamp from (back probe) terminal A of the headlamp and panel dimmer switch to ground.

Does the test lamp light?
--
Go to Step 6
Go to Step 5

5

Replace the headlamp and panel dimmer switch. Refer to Headlamp Switch Replacement .

Is the repair complete?
--
System OK
--

6

Connect a test lamp from the INT PRK fuse, located in the left bussed electrical center (LBEC), to ground.

Does the test lamp light?
--
Go to Step 7
Go to Step 8

7

Locate and repair the open in CKT 74 (LT BLU) between the MBEC and the UBEC.

Is the repair complete?
--
System OK
--

8

Locate and repair the open in CKT 74 (LT BLU) between the headlamp and the panel dimmer switch and the LBEC.

Is the repair complete?
--
System OK

Aug 11, 2016 | GMC Sierra Cars & Trucks

1 Answer

Previa rear ac switch won't turn on. relay, resistor and all fuses ok.


may be you should make a diagnostic and you can do it in a garage or you can do it by yourself if you want to do it by yourself you need some tools and you can find some good ones here: http://www.spobd2.com

Feb 17, 2013 | 2004 Chevrolet TrailBlazer

1 Answer

Need a fuse box diagram for a 2004 mercury sable. Horn stopped working


1) Check for power to horn unit with steering wheel horn switch depressed. If power present, replace horn unit.

2) Check horn switch operation. Repair or replace.

3) Check continuity from driver's horn switch mechanism and horn wiring. If faulty, then trace wiring back to fuse box and relay assembly.

Make sure you haven't skipped any steps before attacking the fuse box issue.

Nov 03, 2012 | 2004 Mercury Sable

1 Answer

EXHAUST MANIFOLD REMOVAL PROCEDURE


What part of the exhaust do you want to replace? If it is the exhaust manifold gasket, usually you don't need to touch intake, but it can be one of the most frustrating jobs if you haven't got the right tools. The right tools can twist and turn in the right places. If you haven't got the right tools , it can be easier to take both manifolds off to do job properly. More time to take intake manifold off , but less time in long run as you can access manifold/head surfaces if you haven't got right tools.

Sep 21, 2012 | 1993 Ford Tempo

1 Answer

Slim Samsung HDTV will not turn on


Hello
You haven't given the exact model number to your TV here. Anyway, check its mains fuse [can be located at its power regulator board] first. If it find opened, do not replace an other; without rectifying the fulat inside the power board. If protection fuse should blow up, surely there will be some reason for that, including short circuit or failure of components.
If you replace the fuse with an other one, the fuse that you will insert will also blow up, and may cuse more faults to other components. OK.

Feb 07, 2012 | Televison & Video

1 Answer

I have a 32" CRT Sylvania Tv that won't turn


Hello
If the TV doesn't turn ON ata all, it is surely due to some fault with its power supply regulator section. You haven't given any otehr details of your tV, than it is only a 32 inch CRT Sylvanial Tv. No model number; so I only can provide you a solution in general.
Check the ON-OFF switch for its contact. Normally, TVs uses DPST type switches [Double Pole Single Throw]. If any one contact amoung them have any problem with its internal contacts, the set won't switch ON. If the switch is OK, come towards the power regulator section circuit board, and check whether the fuse has blown out or not. If it has blown out, replace it with same type and ampere rating. Never use higher ampere rating than specified. The ampere rating will be maiked either on the rims of the fuse, or at the printed circuit board, just under the fuse. After repalcing the fuse, switch ON the TV and see whether it works well or the replaced fuse blows up as soon as you switch ON the set. If the repalced switch burns out as soon as you switch ON the set, the power supply section has damaged [shorted components in it]; and should be replaced.
Normally for LCD TVs it will be good to replace the power supply as card basis. This power regulator card can be bought from most of the electronic spare part shops at your town, orby the authorised service center for Sylvania at your town. If you may have given its model number, I could send you the picture of the power card of your TV. OK.

Sep 28, 2011 | Sylvania 32 in. Diagonal LCD HDTV

1 Answer

* Dome and courtesy lights out. * Fuses in dash panel and engine panel seem fine (but I do not know which in internal LPS fuse it is) * Using Haynes manual on 2003 Malibu pg 12-37 indicates it is a fuse,...


First try the dimmer switch. You can turn the dome lights out with this switch. When body control modules go out they usually start with the door locks, and windows. And as they progress to worse the car wont start. Juction block, possibly, not likely. I haven't to date replaced a BCM for the dome lights. It has always been the switch was off or the switch was bad.
Randy

May 15, 2011 | 2003 Chevrolet Malibu

1 Answer

Turn signals and brake lights won't function


GET A GOOD FUSE TESTER, TEST EACH FUSE. THERE ARE 2 FUSEBOXES. ONE UNDER THE HOOD & ONE IN THE DASH. ALL FUSES CAN BE TESTED WHILE STILL IN PLACE. THERE ARE TEST POINTS FACING OUT. TURN ON IGNITION SWITCH FOR THIS TEST. POWER ON 1 SIDE, BAD FUSE POWER ON BOTH SIDES, GOOD FUSE. POWER ON NEITHER SIDE, SPARE FUSE.

IF ALL FUSES RELATED TO THIS PROBLEM TEST OK, CHECK OR REPLACE THE TURN/SIGNAL/HAZARD FLASHER, { LOCATED UNDER DASH, NEAR STEERING COLUMN, PROBABLY SQUARE & BLACK. IF THAT'S OK, IT WILL HAVE TO BE THE TURN SIGNAL/ HAZARD SWITCH. ALSO CALLED COMBINATION SWITCH. REMOVE THE PLASTIC HOUSING AROUND THE STEERING COLUMN UNDER THE STEERING WHEEL. IT LOOKS LIKE THE AIRBAG & A LOT OF SPECIALIZED TOOLS WILL BE NEEDED. YOU MAY HAVE TO EMPLOY A RELIABLE SHOP IF THE COMBINATION SWITCH IS THE PROBLEM

Jan 10, 2011 | 1996 Chevrolet Cavalier

1 Answer

Dremel 400 xpr stopped working. checked brushes looked ok but replaced with new ones. still not working. tool is still fairly new with only light to medium use.


It could be the fuse between the brush and variable speed control switch. I have the same problem and found the fuse blown. I am hoping that I can replace the fuse without having to buy the complete speed control unit which is about $17.00 from Dremel. If yours is still under warranty you could send it back. If I can find a fuse for mine I will let you know where to get them. joatmontag

Mar 31, 2009 | Dremel 400 Xpr Rotary Tool

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