gulzarh

i have Honda civic 2002 dx four door. his rear defroster is not working at all. when i press the button on there is light which stay on but Nothing happen behind.
any suggestion where to start. i want to repair it my self.
thanks

CraigW

iTrader: (1)

At some point they began hiding the connections made to the glass behind the plastic panels.....are yours hidden ?

Own a DMM, or 12V test light ??

gulzarh

i can see all the little wire throug the rear glass, i dont have any test light or dmm

CraigW

iTrader: (1)

Those are the heating grid lines (except for those towards the top that are the radio antenna)

It sounds like the main connections (switched power & ground path) are hidden on the sides behind panels for aesthetics. Those would be the best to check for voltage, and proper grounding.

I remember a while back that someone had issues with a connection in the black box under the back deck near the speaker.

CraigW

iTrader: (1)

Dis one.......https://www.civicforums.com/forums/1...rear+defroster

gulzarh

i am going to buy the multimeter in next three hours, what exactly should i check and where to connect and where to set the multimeter setting? i has never used multimeter before?

CraigW

iTrader: (1)

The poster was not very clear about the actual fix utilized. Not sure if they are still around to explain or not.

Here is schematic.... hold off on DMM and try to locate the wiring/connector they mentioned... and use a visual inspection instead. Look for dark, or brown discoloration due to high heat from a poor connection.

gulzarh

i will try to see if there is circuit in the wire behind and will get you back in next 5 hours.

gulzarh

i have bought this multimeter, can you or someone tell me where should i place the Arrow and what voltage or amperage it should indicate while testing and how to test ?
thanks a lot i am newbie


http://www.canadiantire.ca/en/pdp/ma...-0520060p.html


i have one question, i see the ground wire between engine block and chasis is broken. does it concern to my problem? or this ground wire is not important?
if the problem is here, than can i use any electric wire to make the connection or it need specific kind of wire type?
what is mean by ''any electric wire '' is the home use power cord, can i cut it and connect it temporarly?

CraigW

iTrader: (1)

DC Volts @ 20v, find good solid grounding place for black lead.

Get the broken ground lead from the dealer, it is not related to defrost inop.

gulzarh

i did but it show 0.00
when i used the battery booster cable as a ground cable between engine block and chassis than it show -0.00

Colin42

Go watch some youtube videos on how to use a multimeter so you understand how they work. It will make diagnosing the problem much easier.

CraigW

iTrader: (1)

Use the V, Ohms jack as red lead & COM jack as the black minus/ground lead.

DO NOT USE THE 10A JACK

You would need key at II, and defroster turned on to have voltage present in that circuit.

gulzarh

yes i maked sure the arrow is on Voltage side on 20 as you mentonned before, the red is postiive and black is negative.
i have turned the rear defroster on full than i have touche red wire on the gride panel connector and black wire on ground, but it still show 0.00v it mean the current is not reaching the gride panel. i have also checked the fuse box under hood and under driver side and all the fuse look fine i have took them out one by one. i dont understand where can be the problem.
i have watched many many video on YouTube about this problem but none is answering me. that s why i open account on thiswebsite and asked the question.

CraigW

iTrader: (1)

Where are you probing for voltage ??

At the larger connections on the sides of window that provide voltage and ground path ?? Those would be best and only one side would have voltage as other side is grounded.

gulzarh

Yes, you were right I didn't know how to use multimeter. I know it now.
I did as you said and tested all the small lines one by one and all of them are showing 0.12 which mean it is good sign that there is current (I believe). So, can someone tell me where could be the problem?
Thanks

CraigW

iTrader: (1)

Did you inspect the connector for discolor as in the link ?

0.12 is NOT the voltage you are looking for.

gulzarh

so what voltage it should be?

CraigW

iTrader: (1)

Engine off, around 12.0 V or so.

OP check the linked thread from cve, you need to locate that connector spoke of and concentrate on it since no voltage at glass.

NDNV

Check the #11 fuse (30A) and the rear window defogger relay.

gulzarh

how it will get current if the engine is off? should i put the key to ON position before testing?
when i did the last checkup i started the engine, turn ON the defroster/defoger than test it.

gulzarh

i have test the fuse Under dash and it is good i even replace him with another one with same amp.
the relay Under Hood is good also and i can hear a little click also when i we press the defrogger button

CraigW

iTrader: (1)

Engine running, or key at II and defroster switch on. Either way will be around 12V

The indicator for defroster is lighting when switched on......correct ??

gulzarh

yeah it show ON thats correct.

CraigW

iTrader: (1)

Take the cover from the black box mounted on passenger side up near rear speakers, and locate the single pin connector with single black wire. Probe that terminal (should be able to get test lead into back of connector) Turn on defrost and measure voltage at it. If no voltage then you will have to work forward. Next inline would be the connector mentioned earlier.

gulzarh

will do it soon,
right now behin on the glass it show 0.07, i did it correctly, it mean there is not enough current.

gulzarh

sorry i didn't got it, which black box. everything is in gray colour in my car except the cd player and heat buttons.

gulzarh

can someone help me please?

GolNat

iTrader: (7)

I think the black box is located in the trunk area under the shelf that holds the rear speakers. Did you look there? If not it might be under a plastic trim piece. Craig will be able to answer this better and I am sure he will be able to chime in soon.

CraigW

iTrader: (1)

.07V means you have no voltage present.

Next place back from the grid lines would be the black box, and the single pin connector with single black wire. Next back from that would be the multi pin
connector coming from up front.

The box is where mentioned....under the rear deck.