Normal mapping in OpenGL immediate mode - c++

Question

I have been trying to load various texture types onto my model, so far I have just loaded a diffuse texture onto it, which works fine. However, I have been getting stuck on using a normal map, the map is read in from file correctly however I cannot get it to act like a normal map as opposed to a diffuse map. (Image for clarification).
Below is the load texture code: (BMP is a Bitmap file reader struct)
BMP tempTexturedData(path);
mWidth = tempTexturedData.bmp_info_header.width;
mHeight = tempTexturedData.bmp_info_header.height;
tempTexturedData.ConvertToRGB();
std::cout << path << " is loaded\n";
glGenTextures(1, &mID);
glBindTexture(GL_TEXTURE_2D, mID);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, mWidth, mHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, tempTexturedData.rgbData.data());
return true;
Here is the render code:
glPushMatrix();
glTranslatef(mPosition.x, mPosition.y, mPosition.z);
glScalef(mScale.x, mScale.y, mScale.z);
glRotatef(mRotation.x, 1.0f, 0.0f, 0.0f);
glRotatef(mRotation.y, 0.0f, 1.0f, 0.0f);
glRotatef(mRotation.z, 0.0f, 0.0f, 1.0f);
if (mTexture != nullptr) {
glBindTexture(GL_TEXTURE_2D, mTexture->GetID());
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
}
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glBegin(GL_TRIANGLES);
for (int i = 0; i < mesh.indices.size(); i++) {
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, &(mesh.meshMaterial.Ka.x));
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, &(mesh.meshMaterial.Kd.x));
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, &(mesh.meshMaterial.Ks.x));
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, mesh.meshMaterial.illum);
glTexCoord2fv(&mesh.verticies[mesh.indices[i]].textureCoordinate.x);
glNormal3fv(&mesh.verticies[mesh.indices[i]].normal.x);
glVertex3fv(&mesh.verticies[mesh.indices[i]].position.x);
}
glEnd();
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glPopMatrix();