How To Test and Replace A Starter Relay

now today we'll be showing out how to

test and replace a starter relay now

chances are you're watching this video

because you're attempting to start your

vehicle and nothing happens there's no

cranking if you hear cranking this is

not your problem but if you have no

cranking from the starter maybe you try

jumping the vehicle

nothing happened still this may be the

culprit now very quickly before we begin

you may be thinking how do I find this

on my vehicle two things you can try

number one is a web search specific for

your vehicle and very often you can find

images and diagrams showing where the

relay lives even try a forum specific

for your vehicle most likely you will be

successful so we know based on that

diagram that the relays live underneath

the dash and right there on the corner

in fact if I remove this cover I have

some fuses and then directly above it

that's where we find the relays let me

place down the camera and we'll remove

this plastic cover now holding on this

plastic cover really are just a few

plastic fasteners which you will see in

a moment typically there could be one

here and a couple on the top corners now

removing them can be quite tough

sometimes if you can't fit a couple

fingers underneath the plastic it can

also hurt your fingers as you try to

remove it well you can do is purchase a

set like this maybe ten eleven dollars

off Amazon I'm really nice a nice set

this is definitely one of the better

ones that I've owned it's just a trim

removal set as you can see of a number

of different adapters I'll include a

link if you guys do need this off Amazon

in the description box below

very very simply all that you do just

insert the tool and you rotate okay

let's rotate the gold very very slowly

around the perimeter and slowly pull off

there you go the housing as you can see

you have these plastic fasteners now if

you do break these there are a number of

kits they can purchase

you can easily as you can see this one

is is broken I I'll have to replace this

but you can purchase a kit that will

have a number of adapters so you can go

ahead and take care of that now let's go

ahead and take a look what we have here

and right here these are our relays in

this case for the starter this is the

starter cut relay so let's go ahead and

remove it the relay is pretty much

removed just once you get a good grip on

it that's all it is very very simple

small device testing that really is

quite simple you really just need three

components number one is a battery pack

that pushes out 12 volts you can use

your car battery in our case I have an

RC battery pack that does the job number

two is a digital multimeter do not get

overwhelmed with these very simple to

use and absolute must-have if you plan

on doing your own auto repair also very

very useful for inside the house but

that being said take a look at the

multimeter this one is roughly fifteen

dollars and you have a number of

different symbols what you want to find

is the symbol for continuity now

continuity means two points make a

connection that's it

very very simple so looking at the meter

the continuity setting is it looks like

a Wi-Fi hotspot so that's what you want

to find they all have the same symbol it

doesn't matter what brand you purchase

so a Wi-Fi hotspot take a look at the

screen right there Wi-Fi hotspot so now

I'm on the continuity setting so if I

touch these two leads we have continuity

so this is ready to go then I have

alligator clips because I need to get

power from the pack to the relay now

don't forget this is really just a

switch so when power and ground is

supplied to the relay there's a little

switch that turns on here and it allows

current to flow to in our case at the

starter now you may be looking at this

and thinking well how do I know which

prompts to touch well two things

trial and error which I'll show you now

I'll do that based on I don't know which

prompts to touch or if you have the


repair manual as I was stating earlier

the repair manual will tell you which

prongs to touch okay in other words

which prongs receive power and which

prongs to test for continuity but don't

go crazy it's very very simple so what

we're going to do here are the alligator

clips so positive the positive of course

don't cross the leads and negative to

negative okay now let's say I don't know

which two prongs to touch well the first

thing is you want to test the horizontal

in my case and the vertical now most

likely yours will look very very similar

to this one you have two horizontal

leads and two vertical leads now if you

do have five leads we have a separate

video think that was a fuel pump uh no

clue that link below and with the five

leads you can also test this very very

simply but that being said chances are

you'll have a Ford lead as this really


so let's first apply power and ground to

the top relay now it doesn't matter if

you're positive is here and your

negative is here or vice versa because

what you want to hear for by the way is

a clicking noise okay that tells you

that the relay is energized I didn't

hear anything there so let's try the

other way okay nothing okay I don't hear

anything so let's try the vertical guys

so one lead here one lead here and there

you go you hear that that is a very good

sign that this is working but it's not

foolproof but let's say I did this the

other way okay still turns on so now let

me just move this to look too close so

now I want to verify once this is

powered these two leaks should be

connected inside the relay so again this

switch will now be touching both leads

so let's see if this is working

correctly so if you hear that clicking

noise very good sign but it's not again

it's not a hundred percent grab your

multimeter and check for continuity okay

one lead goes here the other lead here

let me zoom in just in case

there we go okay here we go one lead on

the bottom one on top there we go

continuity if I reverse it does it make

a difference okay that's it so that

verifies let me make it study so that

verifies that the relay is working now

if you do this test and your relay is

perfectly fine but you're having trouble

with your vehicle in other words you're

turning the key and nothing is happening

you're not getting a crank from the

starter we just did a video a few days

ago regarding how to check the battery

the starter we talked about the ignition

switch this is something called a

transmission range switch I go through

all of that like 20 minutes long I'll

include a link in the description box

below if you want to check that out but

that's all it takes to test a relay very

very simple as you can see quite simple

to test one of these now before we wrap

this up very very quickly I'm going to

create a playlist specifically for

relays I'll include the link above my

shoulder and in the description box

below and that will just add to that

list over the next two weeks I'm going

to start really adding to these

uploading relay videos just so we can

get everything on one source in a sense

so fan relays power window relays

ignition coil relays there are a lot of

relays in your vehicle so in the future

if you have a problem you'll have this

one link to really test any really that

you really need for the most part and

hopefully this will save you money you

know as opposed to your car not running

now you have to get a tow truck bring it

somewhere and that sort of thing it may

just be a $10 part so that being said

thank you for watching I will see you

next time