Question about Cars & Trucks

1 Answer

Technician A says that if a fusible link in the alternator charging circuit is replaced with standard sized automotive wire, the circuit will be unprotected. Technician B says that if a fusible link in the alternator charging circuit is replaced with standard sized automotive wire, the battery will overcharge. Who is right?

Posted by Anonymous on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 15,478 Answers

Technician A is correct. A fusable link has no effect on the charging rate of the battery.

Posted on Feb 03, 2016

5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 599 Answers

SOURCE: No charge to battery

the starting /charging system is interrelated ....check amp draw of starter...be sure ALL grounds on engine alternator starter battery are clean and tight...also you could have a parasitic electrical leak...disconn neg side to battery and put test light in line..should be faint light for radio and computer..nothing more..if it burns bright you have something drawing power when system is off..pull fuses one at a time to discover where ....good luck

Posted on Jan 13, 2009

  • 295 Answers

SOURCE: is there a fuse/fusible link to alternator,

The wiring burning up at the altenator most likely caused the diode inside the altenator to short out. I would just replace the altenator now.

Posted on Mar 18, 2009

  • 1129 Answers

SOURCE: 86 Tercel 2wd wagon won't charge it's battery

clean battery terminals ,bring battery to be tested after charging, after reinstalling battery run car and test alternator output it should be a minimum of 13-14volts if it is under 13 replace alternator , use a voltmeter set on 12 volt 10 amp dc to check the wire to check is located on the back of the alternator covered with a rubber grommet of course hold negative wirw on volt meter to ground and touch red wire to big terminal on back of alternator while car is running should have 14 volts or at least 13 volts

Posted on Jun 24, 2009

buffalonyman
  • 1865 Answers

SOURCE: Charging light come on after alternator replaced

No fusible link, make sure the wires connected to the alternator are making good contact. If you installed a rebuilt alternator, it could be defective. Also check the voltage regulator

Posted on Aug 31, 2009

Testimonial: "Thanks for the replay, is ther a way to check voltage regulator??"

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Battery not charging new alternator still not charging


Did you check power an grounds at the alternator ? The heavy gage wire on the back of the alternator should have B+ voltage , if not fusible link is blown . The connector ,pin's 1 & 3 should have B+ voltage also . There are videos on youtube on checking charging systems . Do you know how to do automotive electrical testing ? How to use a DVOM - digital volt ohm meter ?
How to Test an Alternator Diagnose Charging Issues

Apr 22, 2017 | Cars & Trucks

2 Answers

..Fusible Link What gauge wire do I need to use for the main fusible link in a 2000 jeep cherokee?


my guess he means , what thermal wire code to use.
they are color coded.
the fuse is bottom M1/M2 location of the PDC right"?
the problem is the OP failed to show exact wire.
my guess this is PDC question, (where are your hands/?)
fuse link A11? gas engine, right, USA?
A11 code 10 DG (dark green)
to the generator?
caused by shorted ALT or changing it with battery connected
yes, they blow.
the they have not just one engine, nor one alternator
but 124 amps the alt on 4L , with automatic. 4speed.

these are the rules. SAE.ORG

What size replacement fusible link should be used ?
The automotive service industry recommends using the same gauge and length as the blown fusible link after the cause of failure is corrected.
guide lines,
A 14-gauge wire would be protected by an 18-gauge fusible link. A 6-gauge wire would be protected by a 10-gauge link, and so on. Odd number wire gauge sizes like 19, 15, 13 and 11 are counted when sizing a link. The length of a fusible link should not exceed 9".


is the old link, still readable.
see the color
measure its size,. these tow question are first.

my jeep FSM shows it as 10 gage harness size. (M1/M2 gen slot)
so, 8 gauge thermal link is my guess. per SAE.
why not go to jeep and buy it?

Jan 05, 2017 | 2000 Jeep Cherokee

2 Answers

Finding short in wire from altenater to battery


The temperature of the alternator is not read by the engine temperature gage. It gets hot because it is most likely trying to charge a battery that is failing, have it electronically tested by a auto parts store like Autozone or others, it is a free test.

Jun 16, 2016 | 1999 Oldsmobile Cutlass

1 Answer

Replaced alternator but still not charging


What is year--make--model? I can't look up wiring for your charging system w/o more info?
Do you have voltage at alternator bat terminal, key off? If nothing there, may be problem with wiring circuit or fusible link to battery. Also, most alternators need excite voltage or they won't work. If problem with wiring circuit to or from alternator, replacing the alternator won't fix it.
Some makes and models may have trouble codes for charging system, any applicable trouble codes?

Mar 23, 2016 | Cars & Trucks

1 Answer

We bought two new battery's a new alternator checked all fusible links from alternator to battery. Truck only runs for a few days with battery light on then we have to charge the battery. It's an 2004


open or shorted alternator circuit (control wire)
let your auto store test the alternator charging
on and off the truck.
inspect 3 wire connector for burn or lose connection
disconnect 3 pin wire and start the engine.if the light stay on you have shot to ground.

Mar 25, 2014 | Ford Cars & Trucks

1 Answer

What does fusible shortage affect


A fusible link is a short piece of insulated low-voltage cable within an automotive wiring harness that is designed to protect the harness in applications where a fuse is unsuitable. In an extreme current overload situation, the conductor within the link is melted while the ensuing flame and spark is contained within the link's insulation.

Fusible links are not rated in amps like fuses because each installation is unique and designed to meet specific circuit protection requirements.

The automotive service industry recommends using the same gauge and length as the blown fusible link after the cause of failure is corrected.

Typically, a given harness segment is protected by a fusible link that is four gauge numbers smaller. A 14-gauge wire would be protected by an 18-gauge fusible link. A 6-gauge wire would be protected by a 10-gauge link, and so on. Odd number wire gauge sizes like 19, 15, 13 and 11 are counted when sizing a link. The length of a fusible link should not exceed 9".

In general, a fusible link should never be used to replace an automotive fuse unless authorized by a vehicle factory service bulletin. Likewise, never replace a fusible link with an automotive fuse.

Fusible links are used in most starting circuit applications. For more technical info on fusible links, visit www.sae.org

Dec 01, 2013 | Cars & Trucks

1 Answer

I have an 84 impala and my alternator belt snapped off. Once i replaced the alternator belt, the car started and drove fine except my horn, interior lights, head lights, and tail lights don't work. I...


Circuit Breakers

Print
One device used to protect electrical components from burning out due to excessive current is a circuit breaker. Circuit breakers open and close the flow path for the electricity rapidly in order to protect the circuit if current is excessive. A circuit breaker is used on components which are more likely to draw excessive current such as the breaker found in the light switch that protects the headlight circuit. A separate 30 amp breaker mounted on the firewall or fuse block protects the power window and seat circuits, as applicable.

Fusible Links

Print
A fusible link is a protective device used in an electrical circuit and acts very much like a standard fuse. The major difference lies in that fusible links are larger and capable of conducting a higher amperage than most fuses. When the current increases beyond the rated amperage for a given link, the fusible metal of the wire link will melt, thus breaking the electrical circuit and preventing further damage to any other components or wiring. Whenever a fusible link is melted because of a short circuit, correct the cause before installing a new one. Most models have four fusible links.
REPLACING FUSIBLE LINKS

  1. Disconnect the negative battery cable, followed by the positive cable. If the link is connected to the junction block or starter solenoid, disconnect it there as well.
  2. Cut the wiring harness right behind the link connector(s) and remove.
  3. Strip the insulation off the harness wire back 1 / 2 in (12.7mm).
  4. Position the clip around the new link and wiring harness or new connector and crimp it securely. Then, solder the connection, using rosin core solder and sufficient heat to guarantee a good connection. Repeat for the remaining connection.
  5. Tape all exposed wiring with electrical tape or use a heat shrink tube, if available. Where necessary, connect the link to the junction block or started solenoid. Reconnect the positive, followed by the negative battery cables.

Oct 21, 2013 | 1984 Chevrolet Impala

1 Answer

What guage wire for the black fusible link?


There should be 2 white wires coming from the alternator. There is a splice where it will go into 1 wire then into the fusible link. If the fusible link is not burned, simply match the gauge wire coming from it. You should never use anything smaller in diameter than 10 gauge wire for the charging system. If you want to replace the fusible link, you can run separate white wires from the alternator to the positive battery post with individual fuses or fusible links. I would recommend each wire have its own Maxi fuse holder with a fuse no less than 60 amps each.

Aug 10, 2012 | 1989 Nissan Pathfinder

1 Answer

Where do i trace my orange/blue wire to from alternator? i have new alternator and batteries, but won't charge. will charge if i jump orange/blue to positive post. Any good suggestions? Thanks Phil


The orange/light blue wire is connected to the red (positive) wire from the battery, through a fusible link (or two links depending on engine size) to pin #3 of the voltage regulator at the alternator. The fusible link will be in the harness so you may have to disassemble the harness. The fusible link is probably blown. This was probably caused by the defective alternator/regulator assembly.

According to my diagram, it appears to go from the red batt wire to a gray 12 gauge fusible link, into a brown 18 gauge link, then turns into the orange/light blue wire and to the alternator.

(A fusible link is a piece of wire that acts like a fuse and will burn out, opening the circuit when amperage above its rating. This protects the circuit and lessens the chance of fire).

Good luck, please ask if you need more info.

May 03, 2011 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

Not charging


Possibly a fusible link somewhere in the circuit has burned through and disconnected the circuit.A wiring diagram would be needed to look for the location of any fusible links Ohms check the wires involved in the alternator charging circuit to verify continuity.

Aug 27, 2008 | Ford F-250 Cars & Trucks

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

917 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75051 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...